__cxx03/__iterator/permutable.h

0001 // -*- C++ -*-
0002 //===----------------------------------------------------------------------===//
0003 //
0004 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0005 // See https://llvm.org/LICENSE.txt for license information.
0006 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0007 //
0008 //===----------------------------------------------------------------------===//
0009
0010 #ifndef _LIBCPP___CXX03___ITERATOR_PERMUTABLE_H
0011 #define _LIBCPP___CXX03___ITERATOR_PERMUTABLE_H
0012
0013 #include <__cxx03/__config>
0014 #include <__cxx03/__iterator/concepts.h>
0015 #include <__cxx03/__iterator/iter_swap.h>
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 template <class _Iterator>
0026 concept permutable =
0027     forward_iterator<_Iterator> && indirectly_movable_storable<_Iterator, _Iterator> &&
0028     indirectly_swappable<_Iterator, _Iterator>;
0029
0030 #endif // _LIBCPP_STD_VER >= 20
0031
0032 _LIBCPP_END_NAMESPACE_STD
0033
0034 #endif // _LIBCPP___CXX03___ITERATOR_PERMUTABLE_H