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