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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <memory>
// Check that the nested types of std::allocator are provided:
// template <class T>
// class allocator
// {
// public:
// typedef size_t size_type;
// typedef ptrdiff_t difference_type;
// typedef T value_type;
//
// typedef true_type propagate_on_container_move_assignment;
// typedef true_type is_always_equal;
// ...
// };
#include <memory>
#include <type_traits>
#include <cstddef>
#include "test_macros.h"
template <typename T, typename U>
TEST_CONSTEXPR_CXX20 bool test()
{
static_assert((std::is_same<typename std::allocator<T>::size_type, std::size_t>::value), "");
static_assert((std::is_same<typename std::allocator<T>::difference_type, std::ptrdiff_t>::value), "");
static_assert((std::is_same<typename std::allocator<T>::value_type, T>::value), "");
static_assert((std::is_same<typename std::allocator<T>::propagate_on_container_move_assignment, std::true_type>::value), "");
static_assert((std::is_same<typename std::allocator<T>::is_always_equal, std::true_type>::value), "");
std::allocator<T> a;
std::allocator<T> a2 = a;
a2 = a;
std::allocator<U> a3 = a2;
(void)a3;
return true;
}
int main(int, char**)
{
test<char, int>();
#ifdef _LIBCPP_VERSION // extension
test<char const, int const>();
#endif // _LIBCPP_VERSION
#if TEST_STD_VER > 17
static_assert(test<char, int>());
#ifdef _LIBCPP_VERSION // extension
static_assert(test<char const, int const>());
#endif // _LIBCPP_VERSION
#endif
return 0;
}
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