diff options
Diffstat (limited to 'absl/meta/type_traits_test.cc')
-rw-r--r-- | absl/meta/type_traits_test.cc | 135 |
1 files changed, 129 insertions, 6 deletions
diff --git a/absl/meta/type_traits_test.cc b/absl/meta/type_traits_test.cc index 912336e99165..d3ead6d05158 100644 --- a/absl/meta/type_traits_test.cc +++ b/absl/meta/type_traits_test.cc @@ -280,10 +280,20 @@ class DeletedCopyAssign { int n_; }; -struct NonCopyable { - NonCopyable() = default; - NonCopyable(const NonCopyable&) = delete; - NonCopyable& operator=(const NonCopyable&) = delete; +struct MovableNonCopyable { + MovableNonCopyable() = default; + MovableNonCopyable(const MovableNonCopyable&) = delete; + MovableNonCopyable(MovableNonCopyable&&) = default; + MovableNonCopyable& operator=(const MovableNonCopyable&) = delete; + MovableNonCopyable& operator=(MovableNonCopyable&&) = default; +}; + +struct NonCopyableOrMovable { + NonCopyableOrMovable() = default; + NonCopyableOrMovable(const NonCopyableOrMovable&) = delete; + NonCopyableOrMovable(NonCopyableOrMovable&&) = delete; + NonCopyableOrMovable& operator=(const NonCopyableOrMovable&) = delete; + NonCopyableOrMovable& operator=(NonCopyableOrMovable&&) = delete; }; class Base { @@ -507,7 +517,9 @@ TEST(TypeTraitsTest, TestTrivialCopyCtor) { absl::is_trivially_copy_constructible<NontrivialCopyCtor>::value); EXPECT_FALSE(absl::is_trivially_copy_constructible<DeletedCopyCtor>::value); EXPECT_FALSE( - absl::is_trivially_copy_constructible<NonCopyable>::value); + absl::is_trivially_copy_constructible<MovableNonCopyable>::value); + EXPECT_FALSE( + absl::is_trivially_copy_constructible<NonCopyableOrMovable>::value); #ifdef ABSL_TRIVIALLY_CONSTRUCTIBLE_VERIFY_TRIVIALLY_DESTRUCTIBLE // type with nontrivial destructor are nontrivial copy construbtible @@ -577,7 +589,8 @@ TEST(TypeTraitsTest, TestTrivialCopyAssign) { // Verify that types without them (i.e. nontrivial or deleted) are not. EXPECT_FALSE(absl::is_trivially_copy_assignable<NontrivialCopyAssign>::value); EXPECT_FALSE(absl::is_trivially_copy_assignable<DeletedCopyAssign>::value); - EXPECT_FALSE(absl::is_trivially_copy_assignable<NonCopyable>::value); + EXPECT_FALSE(absl::is_trivially_copy_assignable<MovableNonCopyable>::value); + EXPECT_FALSE(absl::is_trivially_copy_assignable<NonCopyableOrMovable>::value); // types with vtables EXPECT_FALSE(absl::is_trivially_copy_assignable<Base>::value); @@ -611,6 +624,116 @@ TEST(TypeTraitsTest, TestTrivialCopyAssign) { EXPECT_TRUE(absl::is_trivially_copy_assignable<Trivial&>::value); } +TEST(TypeTraitsTest, TestTriviallyCopyable) { + // Verify that arithmetic types and pointers are trivially copyable. + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<bool>::value); + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<char>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<unsigned char>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<signed char>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<wchar_t>::value); + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<int>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<unsigned int>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<int16_t>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<uint16_t>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<int64_t>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<uint64_t>::value); + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<float>::value); + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<double>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<long double>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<std::string*>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<Trivial*>::value); + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable< + const std::string*>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<const Trivial*>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<std::string**>::value); + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<Trivial**>::value); + + // const qualified types are not assignable but are constructible + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<const int>::value); + + // Trivial copy constructor/assignment and destructor. + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<Trivial>::value); + // Trivial copy assignment, but non-trivial copy constructor/destructor. + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable< + TrivialCopyAssign>::value); + // Trivial copy constructor, but non-trivial assignment. + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable< + TrivialCopyCtor>::value); + + // Types with a non-trivial copy constructor/assignment + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable< + NontrivialCopyCtor>::value); + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable< + NontrivialCopyAssign>::value); + + // Types without copy constructor/assignment, but with move + // MSVC disagrees with other compilers about this: + // EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable< + // MovableNonCopyable>::value); + + // Types without copy/move constructor/assignment + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable< + NonCopyableOrMovable>::value); + + // No copy assign, but has trivial copy constructor. + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable< + DeletedCopyAssign>::value); + + // types with vtables + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable<Base>::value); + + // Verify that simple_pair is trivially copyable if members are + EXPECT_TRUE((absl::type_traits_internal::is_trivially_copyable< + simple_pair<int, char*>>::value)); + EXPECT_TRUE((absl::type_traits_internal::is_trivially_copyable< + simple_pair<int, Trivial>>::value)); + + // Verify that types not trivially copyable are + // correctly marked as such. + EXPECT_FALSE( + absl::type_traits_internal::is_trivially_copyable<std::string>::value); + EXPECT_FALSE(absl::type_traits_internal::is_trivially_copyable< + std::vector<int>>::value); + + // Verify that simple_pairs of types not trivially copyable + // are not marked as trivial. + EXPECT_FALSE((absl::type_traits_internal::is_trivially_copyable< + simple_pair<int, std::string>>::value)); + EXPECT_FALSE((absl::type_traits_internal::is_trivially_copyable< + simple_pair<std::string, int>>::value)); + EXPECT_FALSE((absl::type_traits_internal::is_trivially_copyable< + simple_pair<int, TrivialCopyAssign>>::value)); + + // Verify that arrays of trivially copyable types are trivially copyable + using int10 = int[10]; + EXPECT_TRUE(absl::type_traits_internal::is_trivially_copyable<int10>::value); + using int10x10 = int[10][10]; + EXPECT_TRUE( + absl::type_traits_internal::is_trivially_copyable<int10x10>::value); + + // Verify that references are handled correctly + EXPECT_FALSE( + absl::type_traits_internal::is_trivially_copyable<Trivial&&>::value); + EXPECT_FALSE( + absl::type_traits_internal::is_trivially_copyable<Trivial&>::value); +} + #define ABSL_INTERNAL_EXPECT_ALIAS_EQUIVALENCE(trait_name, ...) \ EXPECT_TRUE((std::is_same<typename std::trait_name<__VA_ARGS__>::type, \ absl::trait_name##_t<__VA_ARGS__>>::value)) |