v1/__algorithm/is_sorted_until.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___ALGORITHM_IS_SORTED_UNTIL_H
0010 #define _LIBCPP___ALGORITHM_IS_SORTED_UNTIL_H
0011
0012 #include <__algorithm/comp.h>
0013 #include <__algorithm/comp_ref_type.h>
0014 #include <__config>
0015
0016 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0017 #  pragma GCC system_header
0018 #endif
0019
0020 _LIBCPP_BEGIN_NAMESPACE_STD
0021
0022 template <class _Compare, class _ForwardIterator>
0023 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
0024 __is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
0025   if (__first != __last) {
0026     _ForwardIterator __i = __first;
0027     while (++__i != __last) {
0028       if (__comp(*__i, *__first))
0029         return __i;
0030       __first = __i;
0031     }
0032   }
0033   return __last;
0034 }
0035
0036 template <class _ForwardIterator, class _Compare>
0037 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
0038 is_sorted_until(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp) {
0039   return std::__is_sorted_until<__comp_ref_type<_Compare> >(__first, __last, __comp);
0040 }
0041
0042 template <class _ForwardIterator>
0043 [[__nodiscard__]] inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
0044 is_sorted_until(_ForwardIterator __first, _ForwardIterator __last) {
0045   return std::is_sorted_until(__first, __last, __less<>());
0046 }
0047
0048 _LIBCPP_END_NAMESPACE_STD
0049
0050 #endif // _LIBCPP___ALGORITHM_IS_SORTED_UNTIL_H