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_SORTABLE_H
11#define _LIBCPP___ITERATOR_SORTABLE_H
12
13#include <__config>
14#include <__functional/identity.h>
15#include <__functional/ranges_operations.h>
16#include <__iterator/concepts.h>
17#include <__iterator/permutable.h>
18#include <__iterator/projected.h>
19
20#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
21#  pragma GCC system_header
22#endif
23
24_LIBCPP_BEGIN_NAMESPACE_STD
25
26#if _LIBCPP_STD_VER >= 20
27
28template <class _Iter, class _Comp = ranges::less, class _Proj = identity>
29concept sortable = permutable<_Iter> && indirect_strict_weak_order<_Comp, projected<_Iter, _Proj>>;
30
31#endif // _LIBCPP_STD_VER >= 20
32
33_LIBCPP_END_NAMESPACE_STD
34
35#endif // _LIBCPP___ITERATOR_SORTABLE_H
36