| //===----------------------------------------------------------------------===// |
| // |
| // 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___TUPLE_PAIR_LIKE_H |
| #define _LIBCPP___TUPLE_PAIR_LIKE_H |
| |
| #include <__config> |
| #include <__tuple/tuple_like.h> |
| #include <__tuple/tuple_size.h> |
| #include <__type_traits/remove_cvref.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER >= 20 |
| |
| template <class _Tp> |
| concept __pair_like = __tuple_like<_Tp> && tuple_size<remove_cvref_t<_Tp>>::value == 2; |
| |
| #endif // _LIBCPP_STD_VER >= 20 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TUPLE_PAIR_LIKE_H |
