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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>
// template <class Ptr>
// struct pointer_traits
// {
// typedef <details> difference_type;
// ...
// };
#include <memory>
#include <type_traits>
#include "test_macros.h"
struct A
{
typedef short element_type;
typedef char difference_type;
};
struct B
{
typedef short element_type;
};
template <class T>
struct C {};
template <class T>
struct D
{
typedef char difference_type;
};
template <class T>
struct E
{
static int difference_type;
};
template <class T>
struct F {
private:
typedef int difference_type;
};
int main()
{
static_assert((std::is_same<std::pointer_traits<A>::difference_type, char>::value), "");
static_assert((std::is_same<std::pointer_traits<B>::difference_type, std::ptrdiff_t>::value), "");
static_assert((std::is_same<std::pointer_traits<C<double> >::difference_type, std::ptrdiff_t>::value), "");
static_assert((std::is_same<std::pointer_traits<D<int> >::difference_type, char>::value), "");
static_assert((std::is_same<std::pointer_traits<E<int> >::difference_type, std::ptrdiff_t>::value), "");
#if TEST_STD_VER >= 11
static_assert((std::is_same<std::pointer_traits<F<int>>::difference_type, std::ptrdiff_t>::value), "");
#endif
}
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