Squashed 'third_party/rules_rust/' content from commit bf59038ca
git-subtree-dir: third_party/rules_rust
git-subtree-split: bf59038cac11798cbaef9f3bf965bad8182b97fa
Signed-off-by: Brian Silverman <bsilver16384@gmail.com>
Change-Id: I5a20e403203d670df467ea97dde9a4ac40339a8d
diff --git a/examples/fibonacci/BUILD.bazel b/examples/fibonacci/BUILD.bazel
new file mode 100644
index 0000000..87ff5c3
--- /dev/null
+++ b/examples/fibonacci/BUILD.bazel
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+load("@rules_rust//rust:defs.bzl", "rust_doc", "rust_doc_test", "rust_library", "rust_test")
+
+rust_library(
+ name = "fibonacci",
+ srcs = ["src/lib.rs"],
+)
+
+rust_test(
+ name = "fibonacci_test",
+ crate = ":fibonacci",
+)
+
+rust_doc(
+ name = "fibonacci_doc",
+ crate = ":fibonacci",
+)
+
+rust_doc_test(
+ name = "fibonacci_doc_test",
+ crate = ":fibonacci",
+)
diff --git a/examples/fibonacci/benches/fibonacci_bench.rs b/examples/fibonacci/benches/fibonacci_bench.rs
new file mode 100644
index 0000000..4a8b721
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+++ b/examples/fibonacci/benches/fibonacci_bench.rs
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+// Copyright 2015 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#![feature(test)]
+
+extern crate fibonacci;
+extern crate test;
+
+use test::Bencher;
+
+#[bench]
+fn bench_fibonacci(b: &mut Bencher) {
+ b.iter(|| fibonacci::fibonacci(40));
+}
diff --git a/examples/fibonacci/src/lib.rs b/examples/fibonacci/src/lib.rs
new file mode 100644
index 0000000..9645417
--- /dev/null
+++ b/examples/fibonacci/src/lib.rs
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+// Copyright 2015 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/// Returns the nth Fibonacci number.
+///
+/// # Examples
+///
+/// ```
+/// assert_eq!(fibonacci::fibonacci(5), 5)
+/// ```
+pub fn fibonacci(n: u64) -> u64 {
+ if n < 2 {
+ return n;
+ }
+ let mut n1: u64 = 0;
+ let mut n2: u64 = 1;
+ for _ in 1..n {
+ let sum = n1 + n2;
+ n1 = n2;
+ n2 = sum;
+ }
+ n2
+}
+
+#[cfg(test)]
+mod test {
+ use super::fibonacci;
+
+ #[test]
+ fn test_fibonacci() {
+ let numbers: Vec<u64> = vec![0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144];
+ for (i, number) in numbers.iter().enumerate() {
+ assert_eq!(*number, fibonacci(i as u64));
+ }
+ }
+}