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 <__config> 15 #include <__iterator/iterator_traits.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 #pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _ForwardIterator, class _BinaryPredicate> 24 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 25 adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) { 26 if (__first != __last) { 27 _ForwardIterator __i = __first; 28 while (++__i != __last) { 29 if (__pred(*__first, *__i)) 30 return __first; 31 __first = __i; 32 } 33 } 34 return __last; 35 } 36 37 template <class _ForwardIterator> 38 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 39 adjacent_find(_ForwardIterator __first, _ForwardIterator __last) { 40 typedef typename iterator_traits<_ForwardIterator>::value_type __v; 41 return _VSTD::adjacent_find(__first, __last, __equal_to<__v>()); 42 } 43 44 _LIBCPP_END_NAMESPACE_STD 45 46 #endif // _LIBCPP___ALGORITHM_ADJACENT_FIND_H 47