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