1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef _LIBCPP___CONCEPTS_SAME_AS_H
10#define _LIBCPP___CONCEPTS_SAME_AS_H
11
12#include <__config>
13#include <__type_traits/is_same.h>
14
15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16# pragma GCC system_header
17#endif
18
19_LIBCPP_BEGIN_NAMESPACE_STD
20
21#if _LIBCPP_STD_VER >= 20
22
23// [concept.same]
24
25template <class _Tp, class _Up>
26concept __same_as_impl = _IsSame<_Tp, _Up>::value;
27
28template <class _Tp, class _Up>
29concept same_as = __same_as_impl<_Tp, _Up> && __same_as_impl<_Up, _Tp>;
30
31#endif // _LIBCPP_STD_VER >= 20
32
33_LIBCPP_END_NAMESPACE_STD
34
35#endif // _LIBCPP___CONCEPTS_SAME_AS_H
36