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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___CXX03___ALGORITHM_REVERSE_H10#define _LIBCPP___CXX03___ALGORITHM_REVERSE_H11 12#include <__cxx03/__algorithm/iter_swap.h>13#include <__cxx03/__algorithm/iterator_operations.h>14#include <__cxx03/__config>15#include <__cxx03/__iterator/iterator_traits.h>16#include <__cxx03/__utility/move.h>17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)19# pragma GCC system_header20#endif21 22_LIBCPP_PUSH_MACROS23#include <__cxx03/__undef_macros>24 25_LIBCPP_BEGIN_NAMESPACE_STD26 27template <class _AlgPolicy, class _BidirectionalIterator>28inline _LIBCPP_HIDE_FROM_ABI void29__reverse_impl(_BidirectionalIterator __first, _BidirectionalIterator __last, bidirectional_iterator_tag) {30 while (__first != __last) {31 if (__first == --__last)32 break;33 _IterOps<_AlgPolicy>::iter_swap(__first, __last);34 ++__first;35 }36}37 38template <class _AlgPolicy, class _RandomAccessIterator>39inline _LIBCPP_HIDE_FROM_ABI void40__reverse_impl(_RandomAccessIterator __first, _RandomAccessIterator __last, random_access_iterator_tag) {41 if (__first != __last)42 for (; __first < --__last; ++__first)43 _IterOps<_AlgPolicy>::iter_swap(__first, __last);44}45 46template <class _AlgPolicy, class _BidirectionalIterator, class _Sentinel>47_LIBCPP_HIDE_FROM_ABI void __reverse(_BidirectionalIterator __first, _Sentinel __last) {48 using _IterCategory = typename _IterOps<_AlgPolicy>::template __iterator_category<_BidirectionalIterator>;49 std::__reverse_impl<_AlgPolicy>(std::move(__first), std::move(__last), _IterCategory());50}51 52template <class _BidirectionalIterator>53inline _LIBCPP_HIDE_FROM_ABI void reverse(_BidirectionalIterator __first, _BidirectionalIterator __last) {54 std::__reverse<_ClassicAlgPolicy>(std::move(__first), std::move(__last));55}56 57_LIBCPP_END_NAMESPACE_STD58 59_LIBCPP_POP_MACROS60 61#endif // _LIBCPP___CXX03___ALGORITHM_REVERSE_H62