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Diffstat (limited to 'third_party/abseil_cpp/absl/types/any_test.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/types/any_test.cc | 781 |
1 files changed, 781 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/types/any_test.cc b/third_party/abseil_cpp/absl/types/any_test.cc new file mode 100644 index 0000000000..70e4ba22b1 --- /dev/null +++ b/third_party/abseil_cpp/absl/types/any_test.cc @@ -0,0 +1,781 @@ +// Copyright 2017 The Abseil Authors. +// +// 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 +// +// 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, +// 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. + +#include "absl/types/any.h" + +// This test is a no-op when absl::any is an alias for std::any. +#if !defined(ABSL_USES_STD_ANY) + +#include <initializer_list> +#include <type_traits> +#include <utility> +#include <vector> + +#include "gtest/gtest.h" +#include "absl/base/config.h" +#include "absl/base/internal/exception_testing.h" +#include "absl/base/internal/raw_logging.h" +#include "absl/container/internal/test_instance_tracker.h" + +namespace { +using absl::test_internal::CopyableOnlyInstance; +using absl::test_internal::InstanceTracker; + +template <typename T> +const T& AsConst(const T& t) { + return t; +} + +struct MoveOnly { + MoveOnly() = default; + explicit MoveOnly(int value) : value(value) {} + MoveOnly(MoveOnly&&) = default; + MoveOnly& operator=(MoveOnly&&) = default; + + int value = 0; +}; + +struct CopyOnly { + CopyOnly() = default; + explicit CopyOnly(int value) : value(value) {} + CopyOnly(CopyOnly&&) = delete; + CopyOnly& operator=(CopyOnly&&) = delete; + CopyOnly(const CopyOnly&) = default; + CopyOnly& operator=(const CopyOnly&) = default; + + int value = 0; +}; + +struct MoveOnlyWithListConstructor { + MoveOnlyWithListConstructor() = default; + explicit MoveOnlyWithListConstructor(std::initializer_list<int> /*ilist*/, + int value) + : value(value) {} + MoveOnlyWithListConstructor(MoveOnlyWithListConstructor&&) = default; + MoveOnlyWithListConstructor& operator=(MoveOnlyWithListConstructor&&) = + default; + + int value = 0; +}; + +struct IntMoveOnlyCopyOnly { + IntMoveOnlyCopyOnly(int value, MoveOnly /*move_only*/, CopyOnly /*copy_only*/) + : value(value) {} + + int value; +}; + +struct ListMoveOnlyCopyOnly { + ListMoveOnlyCopyOnly(std::initializer_list<int> ilist, MoveOnly /*move_only*/, + CopyOnly /*copy_only*/) + : values(ilist) {} + + std::vector<int> values; +}; + +using FunctionType = void(); +void FunctionToEmplace() {} + +using ArrayType = int[2]; +using DecayedArray = absl::decay_t<ArrayType>; + +TEST(AnyTest, Noexcept) { + static_assert(std::is_nothrow_default_constructible<absl::any>(), ""); + static_assert(std::is_nothrow_move_constructible<absl::any>(), ""); + static_assert(std::is_nothrow_move_assignable<absl::any>(), ""); + static_assert(noexcept(std::declval<absl::any&>().has_value()), ""); + static_assert(noexcept(std::declval<absl::any&>().type()), ""); + static_assert(noexcept(absl::any_cast<int>(std::declval<absl::any*>())), ""); + static_assert( + noexcept(std::declval<absl::any&>().swap(std::declval<absl::any&>())), + ""); + + using std::swap; + static_assert( + noexcept(swap(std::declval<absl::any&>(), std::declval<absl::any&>())), + ""); +} + +TEST(AnyTest, HasValue) { + absl::any o; + EXPECT_FALSE(o.has_value()); + o.emplace<int>(); + EXPECT_TRUE(o.has_value()); + o.reset(); + EXPECT_FALSE(o.has_value()); +} + +TEST(AnyTest, Type) { + absl::any o; + EXPECT_EQ(typeid(void), o.type()); + o.emplace<int>(5); + EXPECT_EQ(typeid(int), o.type()); + o.emplace<float>(5.f); + EXPECT_EQ(typeid(float), o.type()); + o.reset(); + EXPECT_EQ(typeid(void), o.type()); +} + +TEST(AnyTest, EmptyPointerCast) { + // pointer-to-unqualified overload + { + absl::any o; + EXPECT_EQ(nullptr, absl::any_cast<int>(&o)); + o.emplace<int>(); + EXPECT_NE(nullptr, absl::any_cast<int>(&o)); + o.reset(); + EXPECT_EQ(nullptr, absl::any_cast<int>(&o)); + } + + // pointer-to-const overload + { + absl::any o; + EXPECT_EQ(nullptr, absl::any_cast<int>(&AsConst(o))); + o.emplace<int>(); + EXPECT_NE(nullptr, absl::any_cast<int>(&AsConst(o))); + o.reset(); + EXPECT_EQ(nullptr, absl::any_cast<int>(&AsConst(o))); + } +} + +TEST(AnyTest, InPlaceConstruction) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type_t<IntMoveOnlyCopyOnly>(), 5, MoveOnly(), + copy_only); + IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o); + EXPECT_EQ(5, v.value); +} + +TEST(AnyTest, InPlaceConstructionVariableTemplate) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type<IntMoveOnlyCopyOnly>, 5, MoveOnly(), + copy_only); + auto& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o); + EXPECT_EQ(5, v.value); +} + +TEST(AnyTest, InPlaceConstructionWithCV) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type_t<const volatile IntMoveOnlyCopyOnly>(), 5, + MoveOnly(), copy_only); + IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o); + EXPECT_EQ(5, v.value); +} + +TEST(AnyTest, InPlaceConstructionWithCVVariableTemplate) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type<const volatile IntMoveOnlyCopyOnly>, 5, + MoveOnly(), copy_only); + auto& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o); + EXPECT_EQ(5, v.value); +} + +TEST(AnyTest, InPlaceConstructionWithFunction) { + absl::any o(absl::in_place_type_t<FunctionType>(), FunctionToEmplace); + FunctionType*& construction_result = absl::any_cast<FunctionType*&>(o); + EXPECT_EQ(&FunctionToEmplace, construction_result); +} + +TEST(AnyTest, InPlaceConstructionWithFunctionVariableTemplate) { + absl::any o(absl::in_place_type<FunctionType>, FunctionToEmplace); + auto& construction_result = absl::any_cast<FunctionType*&>(o); + EXPECT_EQ(&FunctionToEmplace, construction_result); +} + +TEST(AnyTest, InPlaceConstructionWithArray) { + ArrayType ar = {5, 42}; + absl::any o(absl::in_place_type_t<ArrayType>(), ar); + DecayedArray& construction_result = absl::any_cast<DecayedArray&>(o); + EXPECT_EQ(&ar[0], construction_result); +} + +TEST(AnyTest, InPlaceConstructionWithArrayVariableTemplate) { + ArrayType ar = {5, 42}; + absl::any o(absl::in_place_type<ArrayType>, ar); + auto& construction_result = absl::any_cast<DecayedArray&>(o); + EXPECT_EQ(&ar[0], construction_result); +} + +TEST(AnyTest, InPlaceConstructionIlist) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type_t<ListMoveOnlyCopyOnly>(), {1, 2, 3, 4}, + MoveOnly(), copy_only); + ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + std::vector<int> expected_values = {1, 2, 3, 4}; + EXPECT_EQ(expected_values, v.values); +} + +TEST(AnyTest, InPlaceConstructionIlistVariableTemplate) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type<ListMoveOnlyCopyOnly>, {1, 2, 3, 4}, + MoveOnly(), copy_only); + auto& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + std::vector<int> expected_values = {1, 2, 3, 4}; + EXPECT_EQ(expected_values, v.values); +} + +TEST(AnyTest, InPlaceConstructionIlistWithCV) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type_t<const volatile ListMoveOnlyCopyOnly>(), + {1, 2, 3, 4}, MoveOnly(), copy_only); + ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + std::vector<int> expected_values = {1, 2, 3, 4}; + EXPECT_EQ(expected_values, v.values); +} + +TEST(AnyTest, InPlaceConstructionIlistWithCVVariableTemplate) { + const CopyOnly copy_only{}; + absl::any o(absl::in_place_type<const volatile ListMoveOnlyCopyOnly>, + {1, 2, 3, 4}, MoveOnly(), copy_only); + auto& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + std::vector<int> expected_values = {1, 2, 3, 4}; + EXPECT_EQ(expected_values, v.values); +} + +TEST(AnyTest, InPlaceNoArgs) { + absl::any o(absl::in_place_type_t<int>{}); + EXPECT_EQ(0, absl::any_cast<int&>(o)); +} + +TEST(AnyTest, InPlaceNoArgsVariableTemplate) { + absl::any o(absl::in_place_type<int>); + EXPECT_EQ(0, absl::any_cast<int&>(o)); +} + +template <typename Enabler, typename T, typename... Args> +struct CanEmplaceAnyImpl : std::false_type {}; + +template <typename T, typename... Args> +struct CanEmplaceAnyImpl< + absl::void_t<decltype( + std::declval<absl::any&>().emplace<T>(std::declval<Args>()...))>, + T, Args...> : std::true_type {}; + +template <typename T, typename... Args> +using CanEmplaceAny = CanEmplaceAnyImpl<void, T, Args...>; + +TEST(AnyTest, Emplace) { + const CopyOnly copy_only{}; + absl::any o; + EXPECT_TRUE((std::is_same<decltype(o.emplace<IntMoveOnlyCopyOnly>( + 5, MoveOnly(), copy_only)), + IntMoveOnlyCopyOnly&>::value)); + IntMoveOnlyCopyOnly& emplace_result = + o.emplace<IntMoveOnlyCopyOnly>(5, MoveOnly(), copy_only); + EXPECT_EQ(5, emplace_result.value); + IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o); + EXPECT_EQ(5, v.value); + EXPECT_EQ(&emplace_result, &v); + + static_assert(!CanEmplaceAny<int, int, int>::value, ""); + static_assert(!CanEmplaceAny<MoveOnly, MoveOnly>::value, ""); +} + +TEST(AnyTest, EmplaceWithCV) { + const CopyOnly copy_only{}; + absl::any o; + EXPECT_TRUE( + (std::is_same<decltype(o.emplace<const volatile IntMoveOnlyCopyOnly>( + 5, MoveOnly(), copy_only)), + IntMoveOnlyCopyOnly&>::value)); + IntMoveOnlyCopyOnly& emplace_result = + o.emplace<const volatile IntMoveOnlyCopyOnly>(5, MoveOnly(), copy_only); + EXPECT_EQ(5, emplace_result.value); + IntMoveOnlyCopyOnly& v = absl::any_cast<IntMoveOnlyCopyOnly&>(o); + EXPECT_EQ(5, v.value); + EXPECT_EQ(&emplace_result, &v); +} + +TEST(AnyTest, EmplaceWithFunction) { + absl::any o; + EXPECT_TRUE( + (std::is_same<decltype(o.emplace<FunctionType>(FunctionToEmplace)), + FunctionType*&>::value)); + FunctionType*& emplace_result = o.emplace<FunctionType>(FunctionToEmplace); + EXPECT_EQ(&FunctionToEmplace, emplace_result); +} + +TEST(AnyTest, EmplaceWithArray) { + absl::any o; + ArrayType ar = {5, 42}; + EXPECT_TRUE( + (std::is_same<decltype(o.emplace<ArrayType>(ar)), DecayedArray&>::value)); + DecayedArray& emplace_result = o.emplace<ArrayType>(ar); + EXPECT_EQ(&ar[0], emplace_result); +} + +TEST(AnyTest, EmplaceIlist) { + const CopyOnly copy_only{}; + absl::any o; + EXPECT_TRUE((std::is_same<decltype(o.emplace<ListMoveOnlyCopyOnly>( + {1, 2, 3, 4}, MoveOnly(), copy_only)), + ListMoveOnlyCopyOnly&>::value)); + ListMoveOnlyCopyOnly& emplace_result = + o.emplace<ListMoveOnlyCopyOnly>({1, 2, 3, 4}, MoveOnly(), copy_only); + ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + EXPECT_EQ(&v, &emplace_result); + std::vector<int> expected_values = {1, 2, 3, 4}; + EXPECT_EQ(expected_values, v.values); + + static_assert(!CanEmplaceAny<int, std::initializer_list<int>>::value, ""); + static_assert(!CanEmplaceAny<MoveOnlyWithListConstructor, + std::initializer_list<int>, int>::value, + ""); +} + +TEST(AnyTest, EmplaceIlistWithCV) { + const CopyOnly copy_only{}; + absl::any o; + EXPECT_TRUE( + (std::is_same<decltype(o.emplace<const volatile ListMoveOnlyCopyOnly>( + {1, 2, 3, 4}, MoveOnly(), copy_only)), + ListMoveOnlyCopyOnly&>::value)); + ListMoveOnlyCopyOnly& emplace_result = + o.emplace<const volatile ListMoveOnlyCopyOnly>({1, 2, 3, 4}, MoveOnly(), + copy_only); + ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + EXPECT_EQ(&v, &emplace_result); + std::vector<int> expected_values = {1, 2, 3, 4}; + EXPECT_EQ(expected_values, v.values); +} + +TEST(AnyTest, EmplaceNoArgs) { + absl::any o; + o.emplace<int>(); + EXPECT_EQ(0, absl::any_cast<int>(o)); +} + +TEST(AnyTest, ConversionConstruction) { + { + absl::any o = 5; + EXPECT_EQ(5, absl::any_cast<int>(o)); + } + + { + const CopyOnly copy_only(5); + absl::any o = copy_only; + EXPECT_EQ(5, absl::any_cast<CopyOnly&>(o).value); + } + + static_assert(!std::is_convertible<MoveOnly, absl::any>::value, ""); +} + +TEST(AnyTest, ConversionAssignment) { + { + absl::any o; + o = 5; + EXPECT_EQ(5, absl::any_cast<int>(o)); + } + + { + const CopyOnly copy_only(5); + absl::any o; + o = copy_only; + EXPECT_EQ(5, absl::any_cast<CopyOnly&>(o).value); + } + + static_assert(!std::is_assignable<MoveOnly, absl::any>::value, ""); +} + +// Suppress MSVC warnings. +// 4521: multiple copy constructors specified +// We wrote multiple of them to test that the correct overloads are selected. +#ifdef _MSC_VER +#pragma warning( push ) +#pragma warning( disable : 4521) +#endif + +// Weird type for testing, only used to make sure we "properly" perfect-forward +// when being placed into an absl::any (use the l-value constructor if given an +// l-value rather than use the copy constructor). +struct WeirdConstructor42 { + explicit WeirdConstructor42(int value) : value(value) {} + + // Copy-constructor + WeirdConstructor42(const WeirdConstructor42& other) : value(other.value) {} + + // L-value "weird" constructor (used when given an l-value) + WeirdConstructor42( + WeirdConstructor42& /*other*/) // NOLINT(runtime/references) + : value(42) {} + + int value; +}; +#ifdef _MSC_VER +#pragma warning( pop ) +#endif + +TEST(AnyTest, WeirdConversionConstruction) { + { + const WeirdConstructor42 source(5); + absl::any o = source; // Actual copy + EXPECT_EQ(5, absl::any_cast<WeirdConstructor42&>(o).value); + } + + { + WeirdConstructor42 source(5); + absl::any o = source; // Weird "conversion" + EXPECT_EQ(42, absl::any_cast<WeirdConstructor42&>(o).value); + } +} + +TEST(AnyTest, WeirdConversionAssignment) { + { + const WeirdConstructor42 source(5); + absl::any o; + o = source; // Actual copy + EXPECT_EQ(5, absl::any_cast<WeirdConstructor42&>(o).value); + } + + { + WeirdConstructor42 source(5); + absl::any o; + o = source; // Weird "conversion" + EXPECT_EQ(42, absl::any_cast<WeirdConstructor42&>(o).value); + } +} + +struct Value {}; + +TEST(AnyTest, AnyCastValue) { + { + absl::any o; + o.emplace<int>(5); + EXPECT_EQ(5, absl::any_cast<int>(o)); + EXPECT_EQ(5, absl::any_cast<int>(AsConst(o))); + static_assert( + std::is_same<decltype(absl::any_cast<Value>(o)), Value>::value, ""); + } + + { + absl::any o; + o.emplace<int>(5); + EXPECT_EQ(5, absl::any_cast<const int>(o)); + EXPECT_EQ(5, absl::any_cast<const int>(AsConst(o))); + static_assert(std::is_same<decltype(absl::any_cast<const Value>(o)), + const Value>::value, + ""); + } +} + +TEST(AnyTest, AnyCastReference) { + { + absl::any o; + o.emplace<int>(5); + EXPECT_EQ(5, absl::any_cast<int&>(o)); + EXPECT_EQ(5, absl::any_cast<const int&>(AsConst(o))); + static_assert( + std::is_same<decltype(absl::any_cast<Value&>(o)), Value&>::value, ""); + } + + { + absl::any o; + o.emplace<int>(5); + EXPECT_EQ(5, absl::any_cast<const int>(o)); + EXPECT_EQ(5, absl::any_cast<const int>(AsConst(o))); + static_assert(std::is_same<decltype(absl::any_cast<const Value&>(o)), + const Value&>::value, + ""); + } + + { + absl::any o; + o.emplace<int>(5); + EXPECT_EQ(5, absl::any_cast<int&&>(std::move(o))); + static_assert(std::is_same<decltype(absl::any_cast<Value&&>(std::move(o))), + Value&&>::value, + ""); + } + + { + absl::any o; + o.emplace<int>(5); + EXPECT_EQ(5, absl::any_cast<const int>(std::move(o))); + static_assert( + std::is_same<decltype(absl::any_cast<const Value&&>(std::move(o))), + const Value&&>::value, + ""); + } +} + +TEST(AnyTest, AnyCastPointer) { + { + absl::any o; + EXPECT_EQ(nullptr, absl::any_cast<char>(&o)); + o.emplace<int>(5); + EXPECT_EQ(nullptr, absl::any_cast<char>(&o)); + o.emplace<char>('a'); + EXPECT_EQ('a', *absl::any_cast<char>(&o)); + static_assert( + std::is_same<decltype(absl::any_cast<Value>(&o)), Value*>::value, ""); + } + + { + absl::any o; + EXPECT_EQ(nullptr, absl::any_cast<const char>(&o)); + o.emplace<int>(5); + EXPECT_EQ(nullptr, absl::any_cast<const char>(&o)); + o.emplace<char>('a'); + EXPECT_EQ('a', *absl::any_cast<const char>(&o)); + static_assert(std::is_same<decltype(absl::any_cast<const Value>(&o)), + const Value*>::value, + ""); + } +} + +TEST(AnyTest, MakeAny) { + const CopyOnly copy_only{}; + auto o = absl::make_any<IntMoveOnlyCopyOnly>(5, MoveOnly(), copy_only); + static_assert(std::is_same<decltype(o), absl::any>::value, ""); + EXPECT_EQ(5, absl::any_cast<IntMoveOnlyCopyOnly&>(o).value); +} + +TEST(AnyTest, MakeAnyIList) { + const CopyOnly copy_only{}; + auto o = + absl::make_any<ListMoveOnlyCopyOnly>({1, 2, 3}, MoveOnly(), copy_only); + static_assert(std::is_same<decltype(o), absl::any>::value, ""); + ListMoveOnlyCopyOnly& v = absl::any_cast<ListMoveOnlyCopyOnly&>(o); + std::vector<int> expected_values = {1, 2, 3}; + EXPECT_EQ(expected_values, v.values); +} + +// Test the use of copy constructor and operator= +TEST(AnyTest, Copy) { + InstanceTracker tracker_raii; + + { + absl::any o(absl::in_place_type<CopyableOnlyInstance>, 123); + CopyableOnlyInstance* f1 = absl::any_cast<CopyableOnlyInstance>(&o); + + absl::any o2(o); + const CopyableOnlyInstance* f2 = absl::any_cast<CopyableOnlyInstance>(&o2); + EXPECT_EQ(123, f2->value()); + EXPECT_NE(f1, f2); + + absl::any o3; + o3 = o2; + const CopyableOnlyInstance* f3 = absl::any_cast<CopyableOnlyInstance>(&o3); + EXPECT_EQ(123, f3->value()); + EXPECT_NE(f2, f3); + + const absl::any o4(4); + // copy construct from const lvalue ref. + absl::any o5 = o4; + EXPECT_EQ(4, absl::any_cast<int>(o4)); + EXPECT_EQ(4, absl::any_cast<int>(o5)); + + // Copy construct from const rvalue ref. + absl::any o6 = std::move(o4); // NOLINT + EXPECT_EQ(4, absl::any_cast<int>(o4)); + EXPECT_EQ(4, absl::any_cast<int>(o6)); + } +} + +TEST(AnyTest, Move) { + InstanceTracker tracker_raii; + + absl::any any1; + any1.emplace<CopyableOnlyInstance>(5); + + // This is a copy, so copy count increases to 1. + absl::any any2 = any1; + EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any1).value()); + EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any2).value()); + EXPECT_EQ(1, tracker_raii.copies()); + + // This isn't a copy, so copy count doesn't increase. + absl::any any3 = std::move(any2); + EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any3).value()); + EXPECT_EQ(1, tracker_raii.copies()); + + absl::any any4; + any4 = std::move(any3); + EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(any4).value()); + EXPECT_EQ(1, tracker_raii.copies()); + + absl::any tmp4(4); + absl::any o4(std::move(tmp4)); // move construct + EXPECT_EQ(4, absl::any_cast<int>(o4)); + o4 = *&o4; // self assign + EXPECT_EQ(4, absl::any_cast<int>(o4)); + EXPECT_TRUE(o4.has_value()); + + absl::any o5; + absl::any tmp5(5); + o5 = std::move(tmp5); // move assign + EXPECT_EQ(5, absl::any_cast<int>(o5)); +} + +// Reset the ObjectOwner with an object of a different type +TEST(AnyTest, Reset) { + absl::any o; + o.emplace<int>(); + + o.reset(); + EXPECT_FALSE(o.has_value()); + + o.emplace<char>(); + EXPECT_TRUE(o.has_value()); +} + +TEST(AnyTest, ConversionConstructionCausesOneCopy) { + InstanceTracker tracker_raii; + CopyableOnlyInstance counter(5); + absl::any o(counter); + EXPECT_EQ(5, absl::any_cast<CopyableOnlyInstance&>(o).value()); + EXPECT_EQ(1, tracker_raii.copies()); +} + +////////////////////////////////// +// Tests for Exception Behavior // +////////////////////////////////// + +#if defined(ABSL_USES_STD_ANY) + +// If using a std `any` implementation, we can't check for a specific message. +#define ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(...) \ + ABSL_BASE_INTERNAL_EXPECT_FAIL((__VA_ARGS__), absl::bad_any_cast, \ + "") + +#else + +// If using the absl `any` implementation, we can rely on a specific message. +#define ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(...) \ + ABSL_BASE_INTERNAL_EXPECT_FAIL((__VA_ARGS__), absl::bad_any_cast, \ + "Bad any cast") + +#endif // defined(ABSL_USES_STD_ANY) + +TEST(AnyTest, ThrowBadAlloc) { + { + absl::any a; + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int&>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int&>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int&&>(absl::any{})); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int&&>(absl::any{})); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int>(absl::any{})); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int>(absl::any{})); + + // const absl::any operand + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int&>(AsConst(a))); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<int>(AsConst(a))); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const int>(AsConst(a))); + } + + { + absl::any a(absl::in_place_type<int>); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float&>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float&>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float&&>(absl::any{})); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST( + absl::any_cast<const float&&>(absl::any{})); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float>(a)); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float>(absl::any{})); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float>(absl::any{})); + + // const absl::any operand + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float&>(AsConst(a))); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<float>(AsConst(a))); + ABSL_ANY_TEST_EXPECT_BAD_ANY_CAST(absl::any_cast<const float>(AsConst(a))); + } +} + +class BadCopy {}; + +struct BadCopyable { + BadCopyable() = default; + BadCopyable(BadCopyable&&) = default; + BadCopyable(const BadCopyable&) { +#ifdef ABSL_HAVE_EXCEPTIONS + throw BadCopy(); +#else + ABSL_RAW_LOG(FATAL, "Bad copy"); +#endif + } +}; + +#define ABSL_ANY_TEST_EXPECT_BAD_COPY(...) \ + ABSL_BASE_INTERNAL_EXPECT_FAIL((__VA_ARGS__), BadCopy, "Bad copy") + +// Test the guarantees regarding exceptions in copy/assign. +TEST(AnyTest, FailedCopy) { + { + const BadCopyable bad{}; + ABSL_ANY_TEST_EXPECT_BAD_COPY(absl::any{bad}); + } + + { + absl::any src(absl::in_place_type<BadCopyable>); + ABSL_ANY_TEST_EXPECT_BAD_COPY(absl::any{src}); + } + + { + BadCopyable bad; + absl::any target; + ABSL_ANY_TEST_EXPECT_BAD_COPY(target = bad); + } + + { + BadCopyable bad; + absl::any target(absl::in_place_type<BadCopyable>); + ABSL_ANY_TEST_EXPECT_BAD_COPY(target = bad); + EXPECT_TRUE(target.has_value()); + } + + { + absl::any src(absl::in_place_type<BadCopyable>); + absl::any target; + ABSL_ANY_TEST_EXPECT_BAD_COPY(target = src); + EXPECT_FALSE(target.has_value()); + } + + { + absl::any src(absl::in_place_type<BadCopyable>); + absl::any target(absl::in_place_type<BadCopyable>); + ABSL_ANY_TEST_EXPECT_BAD_COPY(target = src); + EXPECT_TRUE(target.has_value()); + } +} + +// Test the guarantees regarding exceptions in emplace. +TEST(AnyTest, FailedEmplace) { + { + BadCopyable bad; + absl::any target; + ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad)); + } + + { + BadCopyable bad; + absl::any target(absl::in_place_type<int>); + ABSL_ANY_TEST_EXPECT_BAD_COPY(target.emplace<BadCopyable>(bad)); +#if defined(ABSL_USES_STD_ANY) && defined(__GLIBCXX__) + // libstdc++ std::any::emplace() implementation (as of 7.2) has a bug: if an + // exception is thrown, *this contains a value. +#define ABSL_GLIBCXX_ANY_EMPLACE_EXCEPTION_BUG 1 +#endif +#if defined(ABSL_HAVE_EXCEPTIONS) && \ + !defined(ABSL_GLIBCXX_ANY_EMPLACE_EXCEPTION_BUG) + EXPECT_FALSE(target.has_value()); +#endif + } +} + +} // namespace + +#endif // #if !defined(ABSL_USES_STD_ANY) |