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/iterator_traits.h> 16 #include <iterator> // FIXME: replace with <__iterator/distance.h> when it lands 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 #pragma GCC system_header 20 #endif 21 22 _LIBCPP_PUSH_MACROS 23 #include <__undef_macros> 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 28 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 29 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { 30 for (; __first1 != __last1; ++__first1, (void)++__first2) 31 if (!__pred(*__first1, *__first2)) 32 return false; 33 return true; 34 } 35 36 template <class _InputIterator1, class _InputIterator2> 37 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 38 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { 39 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 40 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 41 return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 42 } 43 44 #if _LIBCPP_STD_VER > 11 45 template <class _BinaryPredicate, class _InputIterator1, class _InputIterator2> 46 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 47 __equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 48 _BinaryPredicate __pred, input_iterator_tag, input_iterator_tag) { 49 for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) 50 if (!__pred(*__first1, *__first2)) 51 return false; 52 return __first1 == __last1 && __first2 == __last2; 53 } 54 55 template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 56 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 57 __equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 58 _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, 59 random_access_iterator_tag) { 60 if (_VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 61 return false; 62 return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, 63 typename add_lvalue_reference<_BinaryPredicate>::type>(__first1, __last1, __first2, __pred); 64 } 65 66 template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 67 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 68 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 69 _BinaryPredicate __pred) { 70 return _VSTD::__equal<typename add_lvalue_reference<_BinaryPredicate>::type>( 71 __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_InputIterator1>::iterator_category(), 72 typename iterator_traits<_InputIterator2>::iterator_category()); 73 } 74 75 template <class _InputIterator1, class _InputIterator2> 76 _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 77 equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { 78 typedef typename iterator_traits<_InputIterator1>::value_type __v1; 79 typedef typename iterator_traits<_InputIterator2>::value_type __v2; 80 return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), 81 typename iterator_traits<_InputIterator1>::iterator_category(), 82 typename iterator_traits<_InputIterator2>::iterator_category()); 83 } 84 #endif 85 86 _LIBCPP_END_NAMESPACE_STD 87 88 _LIBCPP_POP_MACROS 89 90 #endif // _LIBCPP___ALGORITHM_EQUAL_H 91