| //===----------------------------------------------------------------------===// |
| // |
| // 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_SWAP_RANGES_H |
| #define _LIBCPP___ALGORITHM_SWAP_RANGES_H |
| |
| #include <__algorithm/iterator_operations.h> |
| #include <__config> |
| #include <__utility/move.h> |
| #include <__utility/pair.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| // 2+2 iterators: the shorter size will be used. |
| template <class _AlgPolicy, class _ForwardIterator1, class _Sentinel1, class _ForwardIterator2, class _Sentinel2> |
| _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 |
| pair<_ForwardIterator1, _ForwardIterator2> |
| __swap_ranges(_ForwardIterator1 __first1, _Sentinel1 __last1, _ForwardIterator2 __first2, _Sentinel2 __last2) { |
| while (__first1 != __last1 && __first2 != __last2) { |
| _IterOps<_AlgPolicy>::iter_swap(__first1, __first2); |
| ++__first1; |
| ++__first2; |
| } |
| |
| return pair<_ForwardIterator1, _ForwardIterator2>(std::move(__first1), std::move(__first2)); |
| } |
| |
| // 2+1 iterators: size2 >= size1. |
| template <class _AlgPolicy, class _ForwardIterator1, class _Sentinel1, class _ForwardIterator2> |
| _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 |
| pair<_ForwardIterator1, _ForwardIterator2> |
| __swap_ranges(_ForwardIterator1 __first1, _Sentinel1 __last1, _ForwardIterator2 __first2) { |
| while (__first1 != __last1) { |
| _IterOps<_AlgPolicy>::iter_swap(__first1, __first2); |
| ++__first1; |
| ++__first2; |
| } |
| |
| return pair<_ForwardIterator1, _ForwardIterator2>(std::move(__first1), std::move(__first2)); |
| } |
| |
| template <class _ForwardIterator1, class _ForwardIterator2> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator2 |
| swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) { |
| return std::__swap_ranges<_ClassicAlgPolicy>( |
| std::move(__first1), std::move(__last1), std::move(__first2)).second; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ALGORITHM_SWAP_RANGES_H |