1fe6060f1SDimitry Andric // -*- C++ -*- 2fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 3fe6060f1SDimitry Andric // 4fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 6fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7fe6060f1SDimitry Andric // 8fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 9fe6060f1SDimitry Andric 10fe6060f1SDimitry Andric #ifndef _LIBCPP___ALGORITHM_EQUAL_H 11fe6060f1SDimitry Andric #define _LIBCPP___ALGORITHM_EQUAL_H 12fe6060f1SDimitry Andric 13fe6060f1SDimitry Andric #include <__algorithm/comp.h> 14*04eeddc0SDimitry Andric #include <__config> 15349cc55cSDimitry Andric #include <__iterator/distance.h> 16fe6060f1SDimitry Andric #include <__iterator/iterator_traits.h> 17fe6060f1SDimitry Andric 18fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19fe6060f1SDimitry Andric #pragma GCC system_header 20fe6060f1SDimitry Andric #endif 21fe6060f1SDimitry Andric 22fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 23fe6060f1SDimitry Andric 24fe6060f1SDimitry Andric template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 25fe6060f1SDimitry Andric _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 26fe6060f1SDimitry Andric equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { 27fe6060f1SDimitry Andric for (; __first1 != __last1; ++__first1, (void)++__first2) 28fe6060f1SDimitry Andric if (!__pred(*__first1, *__first2)) 29fe6060f1SDimitry Andric return false; 30fe6060f1SDimitry Andric return true; 31fe6060f1SDimitry Andric } 32fe6060f1SDimitry Andric 33fe6060f1SDimitry Andric template <class _InputIterator1, class _InputIterator2> 34fe6060f1SDimitry Andric _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 35fe6060f1SDimitry Andric equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { 36fe6060f1SDimitry Andric typedef typename iterator_traits<_InputIterator1>::value_type __v1; 37fe6060f1SDimitry Andric typedef typename iterator_traits<_InputIterator2>::value_type __v2; 38fe6060f1SDimitry Andric return _VSTD::equal(__first1, __last1, __first2, __equal_to<__v1, __v2>()); 39fe6060f1SDimitry Andric } 40fe6060f1SDimitry Andric 41fe6060f1SDimitry Andric #if _LIBCPP_STD_VER > 11 42fe6060f1SDimitry Andric template <class _BinaryPredicate, class _InputIterator1, class _InputIterator2> 43fe6060f1SDimitry Andric inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 44fe6060f1SDimitry Andric __equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 45fe6060f1SDimitry Andric _BinaryPredicate __pred, input_iterator_tag, input_iterator_tag) { 46fe6060f1SDimitry Andric for (; __first1 != __last1 && __first2 != __last2; ++__first1, (void)++__first2) 47fe6060f1SDimitry Andric if (!__pred(*__first1, *__first2)) 48fe6060f1SDimitry Andric return false; 49fe6060f1SDimitry Andric return __first1 == __last1 && __first2 == __last2; 50fe6060f1SDimitry Andric } 51fe6060f1SDimitry Andric 52fe6060f1SDimitry Andric template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 53fe6060f1SDimitry Andric inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 54fe6060f1SDimitry Andric __equal(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, _RandomAccessIterator2 __first2, 55fe6060f1SDimitry Andric _RandomAccessIterator2 __last2, _BinaryPredicate __pred, random_access_iterator_tag, 56fe6060f1SDimitry Andric random_access_iterator_tag) { 57fe6060f1SDimitry Andric if (_VSTD::distance(__first1, __last1) != _VSTD::distance(__first2, __last2)) 58fe6060f1SDimitry Andric return false; 59fe6060f1SDimitry Andric return _VSTD::equal<_RandomAccessIterator1, _RandomAccessIterator2, 60349cc55cSDimitry Andric _BinaryPredicate&>(__first1, __last1, __first2, __pred); 61fe6060f1SDimitry Andric } 62fe6060f1SDimitry Andric 63fe6060f1SDimitry Andric template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> 64fe6060f1SDimitry Andric _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 65fe6060f1SDimitry Andric equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2, 66fe6060f1SDimitry Andric _BinaryPredicate __pred) { 67349cc55cSDimitry Andric return _VSTD::__equal<_BinaryPredicate&>( 68fe6060f1SDimitry Andric __first1, __last1, __first2, __last2, __pred, typename iterator_traits<_InputIterator1>::iterator_category(), 69fe6060f1SDimitry Andric typename iterator_traits<_InputIterator2>::iterator_category()); 70fe6060f1SDimitry Andric } 71fe6060f1SDimitry Andric 72fe6060f1SDimitry Andric template <class _InputIterator1, class _InputIterator2> 73fe6060f1SDimitry Andric _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 bool 74fe6060f1SDimitry Andric equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _InputIterator2 __last2) { 75fe6060f1SDimitry Andric typedef typename iterator_traits<_InputIterator1>::value_type __v1; 76fe6060f1SDimitry Andric typedef typename iterator_traits<_InputIterator2>::value_type __v2; 77fe6060f1SDimitry Andric return _VSTD::__equal(__first1, __last1, __first2, __last2, __equal_to<__v1, __v2>(), 78fe6060f1SDimitry Andric typename iterator_traits<_InputIterator1>::iterator_category(), 79fe6060f1SDimitry Andric typename iterator_traits<_InputIterator2>::iterator_category()); 80fe6060f1SDimitry Andric } 81fe6060f1SDimitry Andric #endif 82fe6060f1SDimitry Andric 83fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 84fe6060f1SDimitry Andric 85fe6060f1SDimitry Andric #endif // _LIBCPP___ALGORITHM_EQUAL_H 86