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_EQUAL_H 11 #define _LIBCPP___ALGORITHM_EQUAL_H 12 13 #include <__algorithm/comp.h> 14 #include <__config> 15 #include <__iterator/distance.h> 16 #include <__iterator/iterator_traits.h> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 # pragma GCC system_header 20 #endif 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 25 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 26 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { 27 for (; __first1 != __last1; ++__first1, (void)++__first2) 28 if (!__pred(*__first1, *__first2)) 29 return false; 30 return true; 31 } 32 33 template <class _InputIterator1, class _InputIterator2> 34 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 35 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { 36 return std::equal(__first1, __last1, __first2, __equal_to()); 37 } 38 39 #if _LIBCPP_STD_VER > 11 40 template <class _BinaryPredicate, class _InputIterator1, class _InputIterator2> 41 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 42 __equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 43 _BinaryPredicate __pred, input_iterator_tag, input_iterator_tag) { 44 for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) 45 if (!__pred(*__first1, *__first2)) 46 return false; 47 return __first1 == __last1 && __first2 == __last2; 48 } 49 50 template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 51 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 52 __equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 53 _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, 54 random_access_iterator_tag) { 55 if (_VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 56 return false; 57 return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, 58 _BinaryPredicate&>(__first1, __last1, __first2, __pred); 59 } 60 61 template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 62 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 63 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 64 _BinaryPredicate __pred) { 65 return _VSTD::__equal<_BinaryPredicate&>( 66 __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_InputIterator1>::iterator_category(), 67 typename iterator_traits<_InputIterator2>::iterator_category()); 68 } 69 70 template <class _InputIterator1, class _InputIterator2> 71 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 bool 72 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { 73 return std::__equal( 74 __first1, 75 __last1, 76 __first2, 77 __last2, 78 __equal_to(), 79 typename iterator_traits<_InputIterator1>::iterator_category(), 80 typename iterator_traits<_InputIterator2>::iterator_category()); 81 } 82 #endif 83 84 _LIBCPP_END_NAMESPACE_STD 85 86 #endif // _LIBCPP___ALGORITHM_EQUAL_H 87