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
  16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  17 #  pragma GCC system_header
  18 #endif
  19
  20 _LIBCPP_BEGIN_NAMESPACE_STD
  21
  22 template <class _Compare, class _ForwardIterator>
  23 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
  24 __is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
  25   if (__first != __last) {
  26     _ForwardIterator __i = __first;
  27     while (++__i != __last) {
  28       if (__comp(*__i, *__first))
  29         return __i;
  30       __first = __i;
  31     }
  32   }
  33   return __last;
  34 }
  35
  36 template <class _ForwardIterator, class _Compare>
  37 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
  38 is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
  39   return std::__is_sorted_until<__comp_ref_type<_Compare> >(__first, __last, __comp);
  40 }
  41
  42 template <class _ForwardIterator>
  43 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
  44 is_sorted_until(_ForwardIterator __first, _ForwardIterator __last) {
  45   return std::is_sorted_until(__first, __last, __less<>());
  46 }
  47
  48 _LIBCPP_END_NAMESPACE_STD
  49
  50 #endif // _LIBCPP___ALGORITHM_IS_SORTED_UNTIL_H