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 <__config> 14 #include <__algorithm/comp.h> 15 #include <__iterator/distance.h> 16 #include <__iterator/iterator_traits.h> 17 #include <type_traits> 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 _InputIterator1, class _InputIterator2, class _BinaryPredicate> 29 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 30 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { 31 for (; __first1 != __last1; ++__first1, (void)++__first2) 32 if (!__pred(*__first1, *__first2)) 33 return false; 34 return true; 35 } 36 37 template <class _InputIterator1, class _InputIterator2> 38 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 39 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { 40 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 41 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 42 return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 43 } 44 45 #if _LIBCPP_STD_VER > 11 46 template <class _BinaryPredicate, class _InputIterator1, class _InputIterator2> 47 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 48 __equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 49 _BinaryPredicate __pred, input_iterator_tag, input_iterator_tag) { 50 for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) 51 if (!__pred(*__first1, *__first2)) 52 return false; 53 return __first1 == __last1 && __first2 == __last2; 54 } 55 56 template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 57 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 58 __equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 59 _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, 60 random_access_iterator_tag) { 61 if (_VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 62 return false; 63 return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, 64 typename add_lvalue_reference<_BinaryPredicate>::type>(__first1, __last1, __first2, __pred); 65 } 66 67 template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 68 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 69 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 70 _BinaryPredicate __pred) { 71 return _VSTD::__equal<typename add_lvalue_reference<_BinaryPredicate>::type>( 72 __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_InputIterator1>::iterator_category(), 73 typename iterator_traits<_InputIterator2>::iterator_category()); 74 } 75 76 template <class _InputIterator1, class _InputIterator2> 77 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 78 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { 79 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 80 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 81 return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), 82 typename iterator_traits<_InputIterator1>::iterator_category(), 83 typename iterator_traits<_InputIterator2>::iterator_category()); 84 } 85 #endif 86 87 _LIBCPP_END_NAMESPACE_STD 88 89 _LIBCPP_POP_MACROS 90 91 #endif // _LIBCPP___ALGORITHM_EQUAL_H 92