1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___ITERATOR_PERMUTABLE_H
11 #define _LIBCPP___ITERATOR_PERMUTABLE_H
12 
13 #include <__config>
14 #include <__iterator/concepts.h>
15 #include <__iterator/iter_swap.h>
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 > 17
24 
25 template <class _Iterator>
26 concept permutable =
27     forward_iterator<_Iterator> &&
28     indirectly_movable_storable<_Iterator, _Iterator> &&
29     indirectly_swappable<_Iterator, _Iterator>;
30 
31 #endif // _LIBCPP_STD_VER > 17
32 
33 _LIBCPP_END_NAMESPACE_STD
34 
35 #endif // _LIBCPP___ITERATOR_PERMUTABLE_H
36