1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H 10 #define _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H 11 12 #include <__algorithm/ranges_is_sorted_until.h> 13 #include <__config> 14 #include <__functional/identity.h> 15 #include <__functional/ranges_operations.h> 16 #include <__iterator/concepts.h> 17 #include <__iterator/projected.h> 18 #include <__ranges/access.h> 19 #include <__ranges/concepts.h> 20 #include <__utility/move.h> 21 22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 23 # pragma GCC system_header 24 #endif 25 26 #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 27 28 _LIBCPP_BEGIN_NAMESPACE_STD 29 30 namespace ranges { 31 namespace __is_sorted { 32 struct __fn { 33 template <forward_iterator _Iter, sentinel_for<_Iter> _Sent, 34 class _Proj = identity, 35 indirect_strict_weak_order<projected<_Iter, _Proj>> _Comp = ranges::less> 36 _LIBCPP_HIDE_FROM_ABI constexpr 37 bool operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { 38 return ranges::__is_sorted_until_impl(std::move(__first), __last, __comp, __proj) == __last; 39 } 40 41 template <forward_range _Range, 42 class _Proj = identity, 43 indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less> 44 _LIBCPP_HIDE_FROM_ABI constexpr 45 bool operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const { 46 auto __last = ranges::end(__range); 47 return ranges::__is_sorted_until_impl(ranges::begin(__range), __last, __comp, __proj) == __last; 48 } 49 }; 50 } // namespace __is_sorted 51 52 inline namespace __cpo { 53 inline constexpr auto is_sorted = __is_sorted::__fn{}; 54 } // namespace __cpo 55 } // namespace ranges 56 57 _LIBCPP_END_NAMESPACE_STD 58 59 #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 60 61 #endif // _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H 62