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_COPYABLE_H 10 #define _LIBCPP___CONCEPTS_COPYABLE_H 11 12 #include <__concepts/assignable.h> 13 #include <__concepts/constructible.h> 14 #include <__concepts/movable.h> 15 #include <__config> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 #if _LIBCPP_STD_VER >= 20 24 25 // [concepts.object] 26 27 // clang-format off 28 template <class _Tp> 29 concept copyable = 30 copy_constructible<_Tp> && 31 movable<_Tp> && 32 assignable_from<_Tp&, _Tp&> && 33 assignable_from<_Tp&, const _Tp&> && 34 assignable_from<_Tp&, const _Tp>; 35 // clang-format on 36 37 #endif // _LIBCPP_STD_VER >= 20 38 39 _LIBCPP_END_NAMESPACE_STD 40 41 #endif // _LIBCPP___CONCEPTS_COPYABLE_H 42