forked from OSchip/llvm-project
38 lines
1.1 KiB
C++
38 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___CONCEPTS_COMMON_REFERENCE_WITH_H
|
|
#define _LIBCPP___CONCEPTS_COMMON_REFERENCE_WITH_H
|
|
|
|
#include <__concepts/convertible_to.h>
|
|
#include <__concepts/same_as.h>
|
|
#include <__config>
|
|
#include <type_traits>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER > 17
|
|
|
|
// [concept.commonref]
|
|
|
|
template<class _Tp, class _Up>
|
|
concept common_reference_with =
|
|
same_as<common_reference_t<_Tp, _Up>, common_reference_t<_Up, _Tp>> &&
|
|
convertible_to<_Tp, common_reference_t<_Tp, _Up>> &&
|
|
convertible_to<_Up, common_reference_t<_Tp, _Up>>;
|
|
|
|
#endif // _LIBCPP_STD_VER > 17
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___CONCEPTS_COMMON_REFERENCE_WITH_H
|