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60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_SWAP_RANGES_H
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#define _LIBCPP___ALGORITHM_SWAP_RANGES_H
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#include <__algorithm/iterator_operations.h>
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#include <__config>
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#include <__utility/move.h>
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#include <__utility/pair.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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// 2+2 iterators: the shorter size will be used.
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template <class _AlgPolicy, class _ForwardIterator1, class _Sentinel1, class _ForwardIterator2, class _Sentinel2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
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pair<_ForwardIterator1, _ForwardIterator2>
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__swap_ranges(_ForwardIterator1 __first1, _Sentinel1 __last1, _ForwardIterator2 __first2, _Sentinel2 __last2) {
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while (__first1 != __last1 && __first2 != __last2) {
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_IterOps<_AlgPolicy>::iter_swap(__first1, __first2);
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++__first1;
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++__first2;
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}
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return pair<_ForwardIterator1, _ForwardIterator2>(std::move(__first1), std::move(__first2));
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}
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// 2+1 iterators: size2 >= size1.
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template <class _AlgPolicy, class _ForwardIterator1, class _Sentinel1, class _ForwardIterator2>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
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pair<_ForwardIterator1, _ForwardIterator2>
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__swap_ranges(_ForwardIterator1 __first1, _Sentinel1 __last1, _ForwardIterator2 __first2) {
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while (__first1 != __last1) {
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_IterOps<_AlgPolicy>::iter_swap(__first1, __first2);
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++__first1;
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++__first2;
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}
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return pair<_ForwardIterator1, _ForwardIterator2>(std::move(__first1), std::move(__first2));
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}
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template <class _ForwardIterator1, class _ForwardIterator2>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator2
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swap_ranges(_ForwardIterator1 __first1, _ForwardIterator1 __last1, _ForwardIterator2 __first2) {
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return std::__swap_ranges<_ClassicAlgPolicy>(
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std::move(__first1), std::move(__last1), std::move(__first2)).second;
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_SWAP_RANGES_H
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