__cxx03/__concepts/copyable.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___CXX03___CONCEPTS_COPYABLE_H
0010 #define _LIBCPP___CXX03___CONCEPTS_COPYABLE_H
0011
0012 #include <__cxx03/__concepts/assignable.h>
0013 #include <__cxx03/__concepts/constructible.h>
0014 #include <__cxx03/__concepts/movable.h>
0015 #include <__cxx03/__config>
0016
0017 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0018 #  pragma GCC system_header
0019 #endif
0020
0021 _LIBCPP_BEGIN_NAMESPACE_STD
0022
0023 #if _LIBCPP_STD_VER >= 20
0024
0025 // [concepts.object]
0026
0027 // clang-format off
0028 template <class _Tp>
0029 concept copyable =
0030     copy_constructible<_Tp> &&
0031     movable<_Tp> &&
0032     assignable_from<_Tp&, _Tp&> &&
0033     assignable_from<_Tp&, const _Tp&> &&
0034     assignable_from<_Tp&, const _Tp>;
0035 // clang-format on
0036
0037 #endif // _LIBCPP_STD_VER >= 20
0038
0039 _LIBCPP_END_NAMESPACE_STD
0040
0041 #endif // _LIBCPP___CXX03___CONCEPTS_COPYABLE_H