v1/__algorithm/ranges_is_sorted.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H
0010 #define _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H
0011
0012 #include <__algorithm/ranges_is_sorted_until.h>
0013 #include <__config>
0014 #include <__functional/identity.h>
0015 #include <__functional/ranges_operations.h>
0016 #include <__iterator/concepts.h>
0017 #include <__iterator/projected.h>
0018 #include <__ranges/access.h>
0019 #include <__ranges/concepts.h>
0020 #include <__utility/move.h>
0021
0022 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0023 #  pragma GCC system_header
0024 #endif
0025
0026 _LIBCPP_PUSH_MACROS
0027 #include <__undef_macros>
0028
0029 #if _LIBCPP_STD_VER >= 20
0030
0031 _LIBCPP_BEGIN_NAMESPACE_STD
0032
0033 namespace ranges {
0034 struct __is_sorted {
0035   template <forward_iterator _Iter,
0036             sentinel_for<_Iter> _Sent,
0037             class _Proj                                               = identity,
0038             indirect_strict_weak_order<projected<_Iter, _Proj>> _Comp = ranges::less>
0039   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
0040   operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {
0041     return ranges::__is_sorted_until_impl(std::move(__first), __last, __comp, __proj) == __last;
0042   }
0043
0044   template <forward_range _Range,
0045             class _Proj                                                            = identity,
0046             indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
0047   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
0048   operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const {
0049     auto __last = ranges::end(__range);
0050     return ranges::__is_sorted_until_impl(ranges::begin(__range), __last, __comp, __proj) == __last;
0051   }
0052 };
0053
0054 inline namespace __cpo {
0055 inline constexpr auto is_sorted = __is_sorted{};
0056 } // namespace __cpo
0057 } // namespace ranges
0058
0059 _LIBCPP_END_NAMESPACE_STD
0060
0061 #endif // _LIBCPP_STD_VER >= 20
0062
0063 _LIBCPP_POP_MACROS
0064
0065 #endif // _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H