diff options
Diffstat (limited to 'absl/meta/type_traits_test.cc')
| -rw-r--r-- | absl/meta/type_traits_test.cc | 425 |
1 files changed, 418 insertions, 7 deletions
diff --git a/absl/meta/type_traits_test.cc b/absl/meta/type_traits_test.cc index f51f5ded..a7a9c5c9 100644 --- a/absl/meta/type_traits_test.cc +++ b/absl/meta/type_traits_test.cc @@ -4,7 +4,7 @@ // 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 +// https://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, @@ -214,6 +214,29 @@ class DeletedDefaultCtor { int n_; }; +class TrivialMoveCtor { + public: + explicit TrivialMoveCtor(int n) : n_(n) {} + TrivialMoveCtor(TrivialMoveCtor&&) = default; + TrivialMoveCtor& operator=(const TrivialMoveCtor& t) { + n_ = t.n_; + return *this; + } + + private: + int n_; +}; + +class NontrivialMoveCtor { + public: + explicit NontrivialMoveCtor(int n) : n_(n) {} + NontrivialMoveCtor(NontrivialMoveCtor&& t) noexcept : n_(t.n_) {} + NontrivialMoveCtor& operator=(const NontrivialMoveCtor&) = default; + + private: + int n_; +}; + class TrivialCopyCtor { public: explicit TrivialCopyCtor(int n) : n_(n) {} @@ -247,6 +270,29 @@ class DeletedCopyCtor { int n_; }; +class TrivialMoveAssign { + public: + explicit TrivialMoveAssign(int n) : n_(n) {} + TrivialMoveAssign(const TrivialMoveAssign& t) : n_(t.n_) {} + TrivialMoveAssign& operator=(TrivialMoveAssign&&) = default; + ~TrivialMoveAssign() {} // can have nontrivial destructor + private: + int n_; +}; + +class NontrivialMoveAssign { + public: + explicit NontrivialMoveAssign(int n) : n_(n) {} + NontrivialMoveAssign(const NontrivialMoveAssign&) = default; + NontrivialMoveAssign& operator=(NontrivialMoveAssign&& t) noexcept { + n_ = t.n_; + return *this; + } + + private: + int n_; +}; + class TrivialCopyAssign { public: explicit TrivialCopyAssign(int n) : n_(n) {} @@ -280,10 +326,20 @@ 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 { @@ -329,6 +385,22 @@ class Base { #define ABSL_GCC_BUG_TRIVIALLY_CONSTRUCTIBLE_ON_ARRAY_OF_NONTRIVIAL 1 #endif +TEST(TypeTraitsTest, TestIsFunction) { + struct Callable { + void operator()() {} + }; + EXPECT_TRUE(absl::is_function<void()>::value); + EXPECT_TRUE(absl::is_function<void()&>::value); + EXPECT_TRUE(absl::is_function<void() const>::value); + EXPECT_TRUE(absl::is_function<void() noexcept>::value); + EXPECT_TRUE(absl::is_function<void(...) noexcept>::value); + + EXPECT_FALSE(absl::is_function<void(*)()>::value); + EXPECT_FALSE(absl::is_function<void(&)()>::value); + EXPECT_FALSE(absl::is_function<int>::value); + EXPECT_FALSE(absl::is_function<Callable>::value); +} + TEST(TypeTraitsTest, TestTrivialDestructor) { // Verify that arithmetic types and pointers have trivial destructors. EXPECT_TRUE(absl::is_trivially_destructible<bool>::value); @@ -474,6 +546,79 @@ TEST(TypeTraitsTest, TestTrivialDefaultCtor) { #endif } +TEST(TypeTraitsTest, TestTrivialMoveCtor) { + // Verify that arithmetic types and pointers have trivial move + // constructors. + EXPECT_TRUE(absl::is_trivially_move_constructible<bool>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<char>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<unsigned char>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<signed char>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<wchar_t>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<int>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<unsigned int>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<int16_t>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<uint16_t>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<int64_t>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<uint64_t>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<float>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<double>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<long double>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<std::string*>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<Trivial*>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<const std::string*>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<const Trivial*>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<std::string**>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<Trivial**>::value); + + // Reference types + EXPECT_TRUE(absl::is_trivially_move_constructible<int&>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<int&&>::value); + + // types with compiler generated move ctors + EXPECT_TRUE(absl::is_trivially_move_constructible<Trivial>::value); + EXPECT_TRUE(absl::is_trivially_move_constructible<TrivialMoveCtor>::value); + + // Verify that types without them (i.e. nontrivial or deleted) are not. + EXPECT_FALSE( + absl::is_trivially_move_constructible<NontrivialCopyCtor>::value); + EXPECT_FALSE(absl::is_trivially_move_constructible<DeletedCopyCtor>::value); + EXPECT_FALSE( + absl::is_trivially_move_constructible<NonCopyableOrMovable>::value); + +#ifdef ABSL_TRIVIALLY_CONSTRUCTIBLE_VERIFY_TRIVIALLY_DESTRUCTIBLE + // type with nontrivial destructor are nontrivial move construbtible + EXPECT_FALSE( + absl::is_trivially_move_constructible<NontrivialDestructor>::value); +#endif + + // types with vtables + EXPECT_FALSE(absl::is_trivially_move_constructible<Base>::value); + + // Verify that simple_pair of such types is trivially move constructible + EXPECT_TRUE( + (absl::is_trivially_move_constructible<simple_pair<int, char*>>::value)); + EXPECT_TRUE(( + absl::is_trivially_move_constructible<simple_pair<int, Trivial>>::value)); + EXPECT_TRUE((absl::is_trivially_move_constructible< + simple_pair<int, TrivialMoveCtor>>::value)); + + // Verify that types without trivial move constructors are + // correctly marked as such. + EXPECT_FALSE(absl::is_trivially_move_constructible<std::string>::value); + EXPECT_FALSE(absl::is_trivially_move_constructible<std::vector<int>>::value); + + // Verify that simple_pairs of types without trivial move constructors + // are not marked as trivial. + EXPECT_FALSE((absl::is_trivially_move_constructible< + simple_pair<int, std::string>>::value)); + EXPECT_FALSE((absl::is_trivially_move_constructible< + simple_pair<std::string, int>>::value)); + + // Verify that arrays are not + using int10 = int[10]; + EXPECT_FALSE(absl::is_trivially_move_constructible<int10>::value); +} + TEST(TypeTraitsTest, TestTrivialCopyCtor) { // Verify that arithmetic types and pointers have trivial copy // constructors. @@ -498,6 +643,10 @@ TEST(TypeTraitsTest, TestTrivialCopyCtor) { EXPECT_TRUE(absl::is_trivially_copy_constructible<std::string**>::value); EXPECT_TRUE(absl::is_trivially_copy_constructible<Trivial**>::value); + // Reference types + EXPECT_TRUE(absl::is_trivially_copy_constructible<int&>::value); + EXPECT_FALSE(absl::is_trivially_copy_constructible<int&&>::value); + // types with compiler generated copy ctors EXPECT_TRUE(absl::is_trivially_copy_constructible<Trivial>::value); EXPECT_TRUE(absl::is_trivially_copy_constructible<TrivialCopyCtor>::value); @@ -507,7 +656,9 @@ 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 @@ -543,6 +694,74 @@ TEST(TypeTraitsTest, TestTrivialCopyCtor) { EXPECT_FALSE(absl::is_trivially_copy_constructible<int10>::value); } +TEST(TypeTraitsTest, TestTrivialMoveAssign) { + // Verify that arithmetic types and pointers have trivial move + // assignment operators. + EXPECT_TRUE(absl::is_trivially_move_assignable<bool>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<char>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<unsigned char>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<signed char>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<wchar_t>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<int>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<unsigned int>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<int16_t>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<uint16_t>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<int64_t>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<uint64_t>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<float>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<double>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<long double>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<std::string*>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial*>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<const std::string*>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<const Trivial*>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<std::string**>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial**>::value); + + // const qualified types are not assignable + EXPECT_FALSE(absl::is_trivially_move_assignable<const int>::value); + + // types with compiler generated move assignment + EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<TrivialMoveAssign>::value); + + // Verify that types without them (i.e. nontrivial or deleted) are not. + EXPECT_FALSE(absl::is_trivially_move_assignable<NontrivialCopyAssign>::value); + EXPECT_FALSE(absl::is_trivially_move_assignable<DeletedCopyAssign>::value); + EXPECT_FALSE(absl::is_trivially_move_assignable<NonCopyableOrMovable>::value); + + // types with vtables + EXPECT_FALSE(absl::is_trivially_move_assignable<Base>::value); + + // Verify that simple_pair is trivially assignable + EXPECT_TRUE( + (absl::is_trivially_move_assignable<simple_pair<int, char*>>::value)); + EXPECT_TRUE( + (absl::is_trivially_move_assignable<simple_pair<int, Trivial>>::value)); + EXPECT_TRUE((absl::is_trivially_move_assignable< + simple_pair<int, TrivialMoveAssign>>::value)); + + // Verify that types not trivially move assignable are + // correctly marked as such. + EXPECT_FALSE(absl::is_trivially_move_assignable<std::string>::value); + EXPECT_FALSE(absl::is_trivially_move_assignable<std::vector<int>>::value); + + // Verify that simple_pairs of types not trivially move assignable + // are not marked as trivial. + EXPECT_FALSE((absl::is_trivially_move_assignable< + simple_pair<int, std::string>>::value)); + EXPECT_FALSE((absl::is_trivially_move_assignable< + simple_pair<std::string, int>>::value)); + + // Verify that arrays are not trivially move assignable + using int10 = int[10]; + EXPECT_FALSE(absl::is_trivially_move_assignable<int10>::value); + + // Verify that references are handled correctly + EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial&&>::value); + EXPECT_TRUE(absl::is_trivially_move_assignable<Trivial&>::value); +} + TEST(TypeTraitsTest, TestTrivialCopyAssign) { // Verify that arithmetic types and pointers have trivial copy // assignment operators. @@ -577,7 +796,8 @@ 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 +831,116 @@ 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)) @@ -953,4 +1283,85 @@ TEST(TypeTraitsTest, IsMoveAssignable) { #endif // _LIBCPP_VERSION } +namespace adl_namespace { + +struct DeletedSwap { +}; + +void swap(DeletedSwap&, DeletedSwap&) = delete; + +struct SpecialNoexceptSwap { + SpecialNoexceptSwap(SpecialNoexceptSwap&&) {} + SpecialNoexceptSwap& operator=(SpecialNoexceptSwap&&) { return *this; } + ~SpecialNoexceptSwap() = default; +}; + +void swap(SpecialNoexceptSwap&, SpecialNoexceptSwap&) noexcept {} + +} // namespace adl_namespace + +TEST(TypeTraitsTest, IsSwappable) { + using absl::type_traits_internal::IsSwappable; + using absl::type_traits_internal::StdSwapIsUnconstrained; + + EXPECT_TRUE(IsSwappable<int>::value); + + struct S {}; + EXPECT_TRUE(IsSwappable<S>::value); + + struct NoConstruct { + NoConstruct(NoConstruct&&) = delete; + NoConstruct& operator=(NoConstruct&&) { return *this; } + ~NoConstruct() = default; + }; + + EXPECT_EQ(IsSwappable<NoConstruct>::value, StdSwapIsUnconstrained::value); + struct NoAssign { + NoAssign(NoAssign&&) {} + NoAssign& operator=(NoAssign&&) = delete; + ~NoAssign() = default; + }; + + EXPECT_EQ(IsSwappable<NoAssign>::value, StdSwapIsUnconstrained::value); + + EXPECT_FALSE(IsSwappable<adl_namespace::DeletedSwap>::value); + + EXPECT_TRUE(IsSwappable<adl_namespace::SpecialNoexceptSwap>::value); +} + +TEST(TypeTraitsTest, IsNothrowSwappable) { + using absl::type_traits_internal::IsNothrowSwappable; + using absl::type_traits_internal::StdSwapIsUnconstrained; + + EXPECT_TRUE(IsNothrowSwappable<int>::value); + + struct NonNoexceptMoves { + NonNoexceptMoves(NonNoexceptMoves&&) {} + NonNoexceptMoves& operator=(NonNoexceptMoves&&) { return *this; } + ~NonNoexceptMoves() = default; + }; + + EXPECT_FALSE(IsNothrowSwappable<NonNoexceptMoves>::value); + + struct NoConstruct { + NoConstruct(NoConstruct&&) = delete; + NoConstruct& operator=(NoConstruct&&) { return *this; } + ~NoConstruct() = default; + }; + + EXPECT_FALSE(IsNothrowSwappable<NoConstruct>::value); + + struct NoAssign { + NoAssign(NoAssign&&) {} + NoAssign& operator=(NoAssign&&) = delete; + ~NoAssign() = default; + }; + + EXPECT_FALSE(IsNothrowSwappable<NoAssign>::value); + + EXPECT_FALSE(IsNothrowSwappable<adl_namespace::DeletedSwap>::value); + + EXPECT_TRUE(IsNothrowSwappable<adl_namespace::SpecialNoexceptSwap>::value); +} + } // namespace |