1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP___ALGORITHM_ADJACENT_FIND_H 11#define _LIBCPP___ALGORITHM_ADJACENT_FIND_H 12 13#include <__algorithm/comp.h> 14#include <__algorithm/iterator_operations.h> 15#include <__config> 16#include <__iterator/iterator_traits.h> 17#include <__utility/move.h> 18 19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20# pragma GCC system_header 21#endif 22 23_LIBCPP_PUSH_MACROS 24#include <__undef_macros> 25 26_LIBCPP_BEGIN_NAMESPACE_STD 27 28template <class _Iter, class _Sent, class _BinaryPredicate> 29_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Iter 30__adjacent_find(_Iter __first, _Sent __last, _BinaryPredicate&& __pred) { 31 if (__first == __last) 32 return __first; 33 _Iter __i = __first; 34 while (++__i != __last) { 35 if (__pred(*__first, *__i)) 36 return __first; 37 __first = __i; 38 } 39 return __i; 40} 41 42template <class _ForwardIterator, class _BinaryPredicate> 43_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 44adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) { 45 return std::__adjacent_find(std::move(__first), std::move(__last), __pred); 46} 47 48template <class _ForwardIterator> 49_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 50adjacent_find(_ForwardIterator __first, _ForwardIterator __last) { 51 return std::adjacent_find(std::move(__first), std::move(__last), __equal_to()); 52} 53 54_LIBCPP_END_NAMESPACE_STD 55 56_LIBCPP_POP_MACROS 57 58#endif // _LIBCPP___ALGORITHM_ADJACENT_FIND_H 59