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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03___ALGORITHM_EQUAL_H11#define _LIBCPP___CXX03___ALGORITHM_EQUAL_H12 13#include <__cxx03/__algorithm/comp.h>14#include <__cxx03/__algorithm/unwrap_iter.h>15#include <__cxx03/__config>16#include <__cxx03/__functional/identity.h>17#include <__cxx03/__iterator/distance.h>18#include <__cxx03/__iterator/iterator_traits.h>19#include <__cxx03/__string/constexpr_c_functions.h>20#include <__cxx03/__type_traits/desugars_to.h>21#include <__cxx03/__type_traits/enable_if.h>22#include <__cxx03/__type_traits/invoke.h>23#include <__cxx03/__type_traits/is_equality_comparable.h>24#include <__cxx03/__type_traits/is_volatile.h>25#include <__cxx03/__utility/move.h>26 27#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)28# pragma GCC system_header29#endif30 31_LIBCPP_PUSH_MACROS32#include <__cxx03/__undef_macros>33 34_LIBCPP_BEGIN_NAMESPACE_STD35 36template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate>37_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool __equal_iter_impl(38 _InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate& __pred) {39 for (; __first1 != __last1; ++__first1, (void)++__first2)40 if (!__pred(*__first1, *__first2))41 return false;42 return true;43}44 45template <class _Tp,46 class _Up,47 class _BinaryPredicate,48 __enable_if_t<__desugars_to_v<__equal_tag, _BinaryPredicate, _Tp, _Up> && !is_volatile<_Tp>::value &&49 !is_volatile<_Up>::value && __libcpp_is_trivially_equality_comparable<_Tp, _Up>::value,50 int> = 0>51_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool52__equal_iter_impl(_Tp* __first1, _Tp* __last1, _Up* __first2, _BinaryPredicate&) {53 return std::__constexpr_memcmp_equal(__first1, __first2, __element_count(__last1 - __first1));54}55 56template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate>57_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool58equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) {59 return std::__equal_iter_impl(60 std::__unwrap_iter(__first1), std::__unwrap_iter(__last1), std::__unwrap_iter(__first2), __pred);61}62 63template <class _InputIterator1, class _InputIterator2>64_LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool65equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) {66 return std::equal(__first1, __last1, __first2, __equal_to());67}68 69_LIBCPP_END_NAMESPACE_STD70 71_LIBCPP_POP_MACROS72 73#endif // _LIBCPP___CXX03___ALGORITHM_EQUAL_H74