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_IS_SORTED_UNTIL_H
10 #define _LIBCPP___ALGORITHM_IS_SORTED_UNTIL_H
11 
12 #include <__algorithm/comp.h>
13 #include <__algorithm/comp_ref_type.h>
14 #include <__config>
15 #include <__iterator/iterator_traits.h>
16 
17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18 #  pragma GCC system_header
19 #endif
20 
21 _LIBCPP_BEGIN_NAMESPACE_STD
22 
23 template <class _Compare, class _ForwardIterator>
24 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
25 __is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
26 {
27     if (__first != __last)
28     {
29         _ForwardIterator __i = __first;
30         while (++__i != __last)
31         {
32             if (__comp(*__i, *__first))
33                 return __i;
34             __first = __i;
35         }
36     }
37     return __last;
38 }
39 
40 template <class _ForwardIterator, class _Compare>
41 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
42 is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
43 {
44     return _VSTD::__is_sorted_until<__comp_ref_type<_Compare> >(__first, __last, __comp);
45 }
46 
47 template<class _ForwardIterator>
48 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
49 is_sorted_until(_ForwardIterator __first, _ForwardIterator __last)
50 {
51     return _VSTD::is_sorted_until(__first, __last, __less<>());
52 }
53 
54 _LIBCPP_END_NAMESPACE_STD
55 
56 #endif // _LIBCPP___ALGORITHM_IS_SORTED_UNTIL_H
57