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_BEGIN_NAMESPACE_STD 24 25 template <class _Iter, class _Sent, class _BinaryPredicate> 26 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _Iter 27 __adjacent_find(_Iter __first, _Sent __last, _BinaryPredicate&& __pred) { 28 if (__first == __last) 29 return __first; 30 _Iter __i = __first; 31 while (++__i != __last) { 32 if (__pred(*__first, *__i)) 33 return __first; 34 __first = __i; 35 } 36 return __i; 37 } 38 39 template <class _ForwardIterator, class _BinaryPredicate> 40 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 41 adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) { 42 return std::__adjacent_find(std::move(__first), std::move(__last), __pred); 43 } 44 45 template <class _ForwardIterator> 46 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 47 adjacent_find(_ForwardIterator __first, _ForwardIterator __last) { 48 typedef typename iterator_traits<_ForwardIterator>::value_type __v; 49 return std::adjacent_find(std::move(__first), std::move(__last), __equal_to<__v>()); 50 } 51 52 _LIBCPP_END_NAMESPACE_STD 53 54 #endif // _LIBCPP___ALGORITHM_ADJACENT_FIND_H 55