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 28 template <class _Iter, class _Comp = ranges::less, class _Proj = identity> 29 concept 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