libcxx/include/__algorithm/ranges_is_sorted.h

   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 _LIBCPP_PUSH_MACROS
  27 #include <__undef_macros>
  28
  29 #if _LIBCPP_STD_VER >= 20
  30
  31 _LIBCPP_BEGIN_NAMESPACE_STD
  32
  33 namespace ranges {
  34 struct __is_sorted {
  35   template <forward_iterator _Iter,
  36             sentinel_for<_Iter> _Sent,
  37             class _Proj                                               = identity,
  38             indirect_strict_weak_order<projected<_Iter, _Proj>> _Comp = ranges::less>
  39   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
  40   operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {
  41     return ranges::__is_sorted_until_impl(std::move(__first), __last, __comp, __proj) == __last;
  42   }
  43
  44   template <forward_range _Range,
  45             class _Proj                                                            = identity,
  46             indirect_strict_weak_order<projected<iterator_t<_Range>, _Proj>> _Comp = ranges::less>
  47   [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool
  48   operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const {
  49     auto __last = ranges::end(__range);
  50     return ranges::__is_sorted_until_impl(ranges::begin(__range), __last, __comp, __proj) == __last;
  51   }
  52 };
  53
  54 inline namespace __cpo {
  55 inline constexpr auto is_sorted = __is_sorted{};
  56 } // namespace __cpo
  57 } // namespace ranges
  58
  59 _LIBCPP_END_NAMESPACE_STD
  60
  61 #endif // _LIBCPP_STD_VER >= 20
  62
  63 _LIBCPP_POP_MACROS
  64
  65 #endif // _LIBCPP__ALGORITHM_RANGES_IS_SORTED_H