libcxx/include/__concepts/movable.h

   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_MOVABLE_H
  10 #define _LIBCPP___CONCEPTS_MOVABLE_H
  11
  12 #include <__concepts/assignable.h>
  13 #include <__concepts/constructible.h>
  14 #include <__concepts/swappable.h>
  15 #include <__config>
  16 #include <__type_traits/is_object.h>
  17
  18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  19 #  pragma GCC system_header
  20 #endif
  21
  22 _LIBCPP_BEGIN_NAMESPACE_STD
  23
  24 #if _LIBCPP_STD_VER >= 20
  25
  26 // [concepts.object]
  27
  28 template <class _Tp>
  29 concept movable = is_object_v<_Tp> && move_constructible<_Tp> && assignable_from<_Tp&, _Tp> && swappable<_Tp>;
  30
  31 #endif // _LIBCPP_STD_VER >= 20
  32
  33 _LIBCPP_END_NAMESPACE_STD
  34
  35 #endif // _LIBCPP___CONCEPTS_MOVABLE_H