Squashed 'third_party/optional/' content from commit 1baad184f
Change-Id: I9b2473a84dcf6d9892f1f7a9fd21b340796b6ff5
git-subtree-dir: third_party/optional
git-subtree-split: 1baad184f022a3a7502db094a984a86adedf9626
diff --git a/tests/constexpr.cpp b/tests/constexpr.cpp
new file mode 100644
index 0000000..dc4db43
--- /dev/null
+++ b/tests/constexpr.cpp
@@ -0,0 +1,47 @@
+#include "catch.hpp"
+#include "optional.hpp"
+
+#define TOKENPASTE(x, y) x##y
+#define TOKENPASTE2(x, y) TOKENPASTE(x, y)
+#define STATIC_REQUIRE(e) \
+ constexpr bool TOKENPASTE2(rqure, __LINE__) = e; \
+ REQUIRE(e);
+
+TEST_CASE("Constexpr", "[constexpr]") {
+#if !defined(TL_OPTIONAL_MSVC2015) && defined(TL_OPTIONAL_CXX14)
+ SECTION("empty construct") {
+ constexpr tl::optional<int> o2{};
+ constexpr tl::optional<int> o3 = {};
+ constexpr tl::optional<int> o4 = tl::nullopt;
+ constexpr tl::optional<int> o5 = {tl::nullopt};
+ constexpr tl::optional<int> o6(tl::nullopt);
+
+ STATIC_REQUIRE(!o2);
+ STATIC_REQUIRE(!o3);
+ STATIC_REQUIRE(!o4);
+ STATIC_REQUIRE(!o5);
+ STATIC_REQUIRE(!o6);
+ }
+
+ SECTION("value construct") {
+ constexpr tl::optional<int> o1 = 42;
+ constexpr tl::optional<int> o2{42};
+ constexpr tl::optional<int> o3(42);
+ constexpr tl::optional<int> o4 = {42};
+ constexpr int i = 42;
+ constexpr tl::optional<int> o5 = std::move(i);
+ constexpr tl::optional<int> o6{std::move(i)};
+ constexpr tl::optional<int> o7(std::move(i));
+ constexpr tl::optional<int> o8 = {std::move(i)};
+
+ STATIC_REQUIRE(*o1 == 42);
+ STATIC_REQUIRE(*o2 == 42);
+ STATIC_REQUIRE(*o3 == 42);
+ STATIC_REQUIRE(*o4 == 42);
+ STATIC_REQUIRE(*o5 == 42);
+ STATIC_REQUIRE(*o6 == 42);
+ STATIC_REQUIRE(*o7 == 42);
+ STATIC_REQUIRE(*o8 == 42);
+ }
+ #endif
+}