libcxx/include/__algorithm/is_sorted_until.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_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