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_SEMIREGULAR_H
10#define _LIBCPP___CONCEPTS_SEMIREGULAR_H
11
12#include <__concepts/constructible.h>
13#include <__concepts/copyable.h>
14#include <__config>
15
16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17#  pragma GCC system_header
18#endif
19
20_LIBCPP_BEGIN_NAMESPACE_STD
21
22#if _LIBCPP_STD_VER >= 20
23
24// [concept.object]
25
26template <class _Tp>
27concept semiregular = copyable<_Tp> && default_initializable<_Tp>;
28
29#endif // _LIBCPP_STD_VER >= 20
30
31_LIBCPP_END_NAMESPACE_STD
32
33#endif // _LIBCPP___CONCEPTS_SEMIREGULAR_H