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