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Diffstat (limited to 'third_party/abseil_cpp/absl/types/internal/conformance_testing_helpers.h')
| -rw-r--r-- | third_party/abseil_cpp/absl/types/internal/conformance_testing_helpers.h | 391 |
1 files changed, 0 insertions, 391 deletions
diff --git a/third_party/abseil_cpp/absl/types/internal/conformance_testing_helpers.h b/third_party/abseil_cpp/absl/types/internal/conformance_testing_helpers.h deleted file mode 100644 index 00775f960c..0000000000 --- a/third_party/abseil_cpp/absl/types/internal/conformance_testing_helpers.h +++ /dev/null @@ -1,391 +0,0 @@ -// Copyright 2019 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. - -#ifndef ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_ -#define ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_ - -// Checks to determine whether or not we can use abi::__cxa_demangle -#if (defined(__ANDROID__) || defined(ANDROID)) && !defined(OS_ANDROID) -#define ABSL_INTERNAL_OS_ANDROID -#endif - -// We support certain compilers only. See demangle.h for details. -#if defined(OS_ANDROID) && (defined(__i386__) || defined(__x86_64__)) -#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 0 -#elif (__GNUC__ >= 4 || (__GNUC__ >= 3 && __GNUC_MINOR__ >= 4)) && \ - !defined(__mips__) -#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 1 -#elif defined(__clang__) && !defined(_MSC_VER) -#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 1 -#else -#define ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE 0 -#endif - -#include <tuple> -#include <type_traits> -#include <utility> - -#include "absl/meta/type_traits.h" -#include "absl/strings/string_view.h" -#include "absl/utility/utility.h" - -#if ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE -#include <cxxabi.h> - -#include <cstdlib> -#endif - -namespace absl { -ABSL_NAMESPACE_BEGIN -namespace types_internal { - -// Return a readable name for type T. -template <class T> -absl::string_view NameOfImpl() { -// TODO(calabrese) Investigate using debugging:internal_demangle as a fallback. -#if ABSL_TYPES_INTERNAL_HAS_CXA_DEMANGLE - int status = 0; - char* demangled_name = nullptr; - - demangled_name = - abi::__cxa_demangle(typeid(T).name(), nullptr, nullptr, &status); - - if (status == 0 && demangled_name != nullptr) { - return demangled_name; - } else { - return typeid(T).name(); - } -#else - return typeid(T).name(); -#endif - // NOTE: We intentionally leak demangled_name so that it remains valid - // throughout the remainder of the program. -} - -// Given a type, returns as nice of a type name as we can produce (demangled). -// -// Note: This currently strips cv-qualifiers and references, but that is okay -// because we only use this internally with unqualified object types. -template <class T> -std::string NameOf() { - static const absl::string_view result = NameOfImpl<T>(); - return std::string(result); -} - -//////////////////////////////////////////////////////////////////////////////// -// -// Metafunction to check if a type is callable with no explicit arguments -template <class Fun, class /*Enabler*/ = void> -struct IsNullaryCallableImpl : std::false_type {}; - -template <class Fun> -struct IsNullaryCallableImpl< - Fun, absl::void_t<decltype(std::declval<const Fun&>()())>> - : std::true_type { - using result_type = decltype(std::declval<const Fun&>()()); - - template <class ValueType> - using for_type = std::is_same<ValueType, result_type>; - - using void_if_true = void; -}; - -template <class Fun> -struct IsNullaryCallable : IsNullaryCallableImpl<Fun> {}; -// -//////////////////////////////////////////////////////////////////////////////// - -// A type that contains a function object that returns an instance of a type -// that is undergoing conformance testing. This function is required to always -// return the same value upon invocation. -template <class Fun> -struct GeneratorType; - -// A type that contains a tuple of GeneratorType<Fun> where each Fun has the -// same return type. The result of each of the different generators should all -// be equal values, though the underlying object representation may differ (such -// as if one returns 0.0 and another return -0.0, or if one returns an empty -// vector and another returns an empty vector with a different capacity. -template <class... Funs> -struct EquivalenceClassType; - -//////////////////////////////////////////////////////////////////////////////// -// -// A metafunction to check if a type is a specialization of EquivalenceClassType -template <class T> -struct IsEquivalenceClass : std::false_type {}; - -template <> -struct IsEquivalenceClass<EquivalenceClassType<>> : std::true_type { - using self = IsEquivalenceClass; - - // A metafunction to check if this EquivalenceClassType is a valid - // EquivalenceClassType for a type `ValueType` that is undergoing testing - template <class ValueType> - using for_type = std::true_type; -}; - -template <class Head, class... Tail> -struct IsEquivalenceClass<EquivalenceClassType<Head, Tail...>> - : std::true_type { - using self = IsEquivalenceClass; - - // The type undergoing conformance testing that this EquivalenceClass - // corresponds to - using result_type = typename IsNullaryCallable<Head>::result_type; - - // A metafunction to check if this EquivalenceClassType is a valid - // EquivalenceClassType for a type `ValueType` that is undergoing testing - template <class ValueType> - using for_type = std::is_same<ValueType, result_type>; -}; -// -//////////////////////////////////////////////////////////////////////////////// - -// A type that contains an ordered series of EquivalenceClassTypes, where the -// the function object of each underlying GeneratorType has the same return type -// -// These equivalence classes are required to be in a logical ascending order -// that is consistent with comparison operators that are defined for the return -// type of each GeneratorType, if any. -template <class... EqClasses> -struct OrderedEquivalenceClasses; - -//////////////////////////////////////////////////////////////////////////////// -// -// A metafunction to determine the return type of the function object contained -// in a GeneratorType specialization. -template <class T> -struct ResultOfGenerator {}; - -template <class Fun> -struct ResultOfGenerator<GeneratorType<Fun>> { - using type = decltype(std::declval<const Fun&>()()); -}; - -template <class Fun> -using ResultOfGeneratorT = typename ResultOfGenerator<GeneratorType<Fun>>::type; -// -//////////////////////////////////////////////////////////////////////////////// - -//////////////////////////////////////////////////////////////////////////////// -// -// A metafunction that yields true iff each of Funs is a GeneratorType -// specialization and they all contain functions with the same return type -template <class /*Enabler*/, class... Funs> -struct AreGeneratorsWithTheSameReturnTypeImpl : std::false_type {}; - -template <> -struct AreGeneratorsWithTheSameReturnTypeImpl<void> : std::true_type {}; - -template <class Head, class... Tail> -struct AreGeneratorsWithTheSameReturnTypeImpl< - typename std::enable_if<absl::conjunction<std::is_same< - ResultOfGeneratorT<Head>, ResultOfGeneratorT<Tail>>...>::value>::type, - Head, Tail...> : std::true_type {}; - -template <class... Funs> -struct AreGeneratorsWithTheSameReturnType - : AreGeneratorsWithTheSameReturnTypeImpl<void, Funs...>::type {}; -// -//////////////////////////////////////////////////////////////////////////////// - -//////////////////////////////////////////////////////////////////////////////// -// -// A metafunction that yields true iff each of Funs is an EquivalenceClassType -// specialization and they all contain GeneratorType specializations that have -// the same return type -template <class... EqClasses> -struct AreEquivalenceClassesOfTheSameType { - static_assert(sizeof...(EqClasses) != sizeof...(EqClasses), ""); -}; - -template <> -struct AreEquivalenceClassesOfTheSameType<> : std::true_type { - using self = AreEquivalenceClassesOfTheSameType; - - // Metafunction to check that a type is the same as all of the equivalence - // classes, if any. - // Note: In this specialization there are no equivalence classes, so the - // value type is always compatible. - template <class /*ValueType*/> - using for_type = std::true_type; -}; - -template <class... Funs> -struct AreEquivalenceClassesOfTheSameType<EquivalenceClassType<Funs...>> - : std::true_type { - using self = AreEquivalenceClassesOfTheSameType; - - // Metafunction to check that a type is the same as all of the equivalence - // classes, if any. - template <class ValueType> - using for_type = typename IsEquivalenceClass< - EquivalenceClassType<Funs...>>::template for_type<ValueType>; -}; - -template <class... TailEqClasses> -struct AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<>, EquivalenceClassType<>, TailEqClasses...> - : AreEquivalenceClassesOfTheSameType<TailEqClasses...>::self {}; - -template <class HeadNextFun, class... TailNextFuns, class... TailEqClasses> -struct AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<>, EquivalenceClassType<HeadNextFun, TailNextFuns...>, - TailEqClasses...> - : AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<HeadNextFun, TailNextFuns...>, - TailEqClasses...>::self {}; - -template <class HeadHeadFun, class... TailHeadFuns, class... TailEqClasses> -struct AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<HeadHeadFun, TailHeadFuns...>, EquivalenceClassType<>, - TailEqClasses...> - : AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<HeadHeadFun, TailHeadFuns...>, - TailEqClasses...>::self {}; - -template <class HeadHeadFun, class... TailHeadFuns, class HeadNextFun, - class... TailNextFuns, class... TailEqClasses> -struct AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<HeadHeadFun, TailHeadFuns...>, - EquivalenceClassType<HeadNextFun, TailNextFuns...>, TailEqClasses...> - : absl::conditional_t< - IsNullaryCallable<HeadNextFun>::template for_type< - typename IsNullaryCallable<HeadHeadFun>::result_type>::value, - AreEquivalenceClassesOfTheSameType< - EquivalenceClassType<HeadHeadFun, TailHeadFuns...>, - TailEqClasses...>, - std::false_type> {}; -// -//////////////////////////////////////////////////////////////////////////////// - -// Execute a function for each passed-in parameter. -template <class Fun, class... Cases> -void ForEachParameter(const Fun& fun, const Cases&... cases) { - const std::initializer_list<bool> results = { - (static_cast<void>(fun(cases)), true)...}; - - (void)results; -} - -// Execute a function on each passed-in parameter (using a bound function). -template <class Fun> -struct ForEachParameterFun { - template <class... T> - void operator()(const T&... cases) const { - (ForEachParameter)(fun, cases...); - } - - Fun fun; -}; - -// Execute a function on each element of a tuple. -template <class Fun, class Tup> -void ForEachTupleElement(const Fun& fun, const Tup& tup) { - absl::apply(ForEachParameterFun<Fun>{fun}, tup); -} - -//////////////////////////////////////////////////////////////////////////////// -// -// Execute a function for each combination of two elements of a tuple, including -// combinations of an element with itself. -template <class Fun, class... T> -struct ForEveryTwoImpl { - template <class Lhs> - struct WithBoundLhs { - template <class Rhs> - void operator()(const Rhs& rhs) const { - fun(lhs, rhs); - } - - Fun fun; - Lhs lhs; - }; - - template <class Lhs> - void operator()(const Lhs& lhs) const { - (ForEachTupleElement)(WithBoundLhs<Lhs>{fun, lhs}, args); - } - - Fun fun; - std::tuple<T...> args; -}; - -template <class Fun, class... T> -void ForEveryTwo(const Fun& fun, std::tuple<T...> args) { - (ForEachTupleElement)(ForEveryTwoImpl<Fun, T...>{fun, args}, args); -} -// -//////////////////////////////////////////////////////////////////////////////// - -//////////////////////////////////////////////////////////////////////////////// -// -// Insert all values into an associative container -template<class Container> -void InsertEach(Container* cont) { -} - -template<class Container, class H, class... T> -void InsertEach(Container* cont, H&& head, T&&... tail) { - cont->insert(head); - (InsertEach)(cont, tail...); -} -// -//////////////////////////////////////////////////////////////////////////////// -// A template with a nested "Invoke" static-member-function that executes a -// passed-in Callable when `Condition` is true, otherwise it ignores the -// Callable. This is useful for executing a function object with a condition -// that corresponds to whether or not the Callable can be safely instantiated. -// It has some overlapping uses with C++17 `if constexpr`. -template <bool Condition> -struct If; - -template <> -struct If</*Condition =*/false> { - template <class Fun, class... P> - static void Invoke(const Fun& /*fun*/, P&&... /*args*/) {} -}; - -template <> -struct If</*Condition =*/true> { - template <class Fun, class... P> - static void Invoke(const Fun& fun, P&&... args) { - // TODO(calabrese) Use std::invoke equivalent instead of function-call. - fun(absl::forward<P>(args)...); - } -}; - -// -// ABSL_INTERNAL_STRINGIZE(...) -// -// This variadic macro transforms its arguments into a c-string literal after -// expansion. -// -// Example: -// -// ABSL_INTERNAL_STRINGIZE(std::array<int, 10>) -// -// Results in: -// -// "std::array<int, 10>" -#define ABSL_INTERNAL_STRINGIZE(...) ABSL_INTERNAL_STRINGIZE_IMPL((__VA_ARGS__)) -#define ABSL_INTERNAL_STRINGIZE_IMPL(arg) ABSL_INTERNAL_STRINGIZE_IMPL2 arg -#define ABSL_INTERNAL_STRINGIZE_IMPL2(...) #__VA_ARGS__ - -} // namespace types_internal -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_TYPES_INTERNAL_CONFORMANCE_TESTING_HELPERS_H_ |