| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ALGORITHM_COPY_BACKWARD_H |
| #define _LIBCPP___ALGORITHM_COPY_BACKWARD_H |
| |
| #include <__algorithm/copy.h> |
| #include <__algorithm/unwrap_iter.h> |
| #include <__config> |
| #include <__iterator/iterator_traits.h> |
| #include <__iterator/reverse_iterator.h> |
| #include <cstring> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Iter1, class _Sent1, class _Iter2> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair<_Iter1, _Iter2> __copy_backward_impl(_Iter1 __first, _Sent1 __last, _Iter2 __result) { |
| auto __ret = std::__copy(reverse_iterator<_Iter1>(__last), |
| reverse_iterator<_Sent1>(__first), |
| reverse_iterator<_Iter2>(__result)); |
| return pair<_Iter1, _Iter2>(__ret.first.base(), __ret.second.base()); |
| } |
| |
| template <class _Iter1, class _Sent1, class _Iter2> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 |
| pair<_Iter1, _Iter2> __copy_backward(_Iter1 __first, _Sent1 __last, _Iter2 __result) { |
| auto __ret = std::__copy_backward_impl(std::__unwrap_iter(__first), |
| std::__unwrap_iter(__last), |
| std::__unwrap_iter(__result)); |
| return pair<_Iter1, _Iter2>(std::__rewrap_iter(__first, __ret.first), std::__rewrap_iter(__result, __ret.second)); |
| } |
| |
| template <class _BidirectionalIterator1, class _BidirectionalIterator2> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| _BidirectionalIterator2 |
| copy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, _BidirectionalIterator2 __result) { |
| return std::__copy_backward(__first, __last, __result).second; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ALGORITHM_COPY_BACKWARD_H |