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 28 template <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 42 template <class _ForwardIterator, class _BinaryPredicate> 43 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 44 adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) { 45 return std::__adjacent_find(std::move(__first), std::move(__last), __pred); 46 } 47 48 template <class _ForwardIterator> 49 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator 50 adjacent_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