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 <__config> 14 #include <__algorithm/comp.h> 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_PUSH_MACROS 22 #include <__undef_macros> 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 template <class _ForwardIterator, class _BinaryPredicate> 27 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 28 adjacent_find(_ForwardIterator __first, _ForwardIterator __last, _BinaryPredicate __pred) { 29 if (__first != __last) { 30 _ForwardIterator __i = __first; 31 while (++__i != __last) { 32 if (__pred(*__first, *__i)) 33 return __first; 34 __first = __i; 35 } 36 } 37 return __last; 38 } 39 40 template <class _ForwardIterator> 41 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator 42 adjacent_find(_ForwardIterator __first, _ForwardIterator __last) { 43 typedef typename iterator_traits<_ForwardIterator>::value_type __v; 44 return _VSTD::adjacent_find(__first, __last, __equal_to<__v>()); 45 } 46 47 _LIBCPP_END_NAMESPACE_STD 48 49 _LIBCPP_POP_MACROS 50 51 #endif // _LIBCPP___ALGORITHM_ADJACENT_FIND_H 52