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368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
58 lines
1.9 KiB
C++
58 lines
1.9 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_POP_HEAP_H
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#define _LIBCPP___ALGORITHM_POP_HEAP_H
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#include <__algorithm/comp.h>
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#include <__algorithm/comp_ref_type.h>
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#include <__algorithm/sift_down.h>
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#include <__config>
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#include <__iterator/iterator_traits.h>
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#include <__utility/swap.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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template <class _Compare, class _RandomAccessIterator>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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void
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__pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp,
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typename iterator_traits<_RandomAccessIterator>::difference_type __len)
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{
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if (__len > 1)
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{
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swap(*__first, *--__last);
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_VSTD::__sift_down<_Compare>(__first, __comp, __len - 1, __first);
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}
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}
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template <class _RandomAccessIterator, class _Compare>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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void
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pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last, _Compare __comp)
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{
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typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
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_VSTD::__pop_heap<_Comp_ref>(__first, __last, __comp, __last - __first);
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}
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template <class _RandomAccessIterator>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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void
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pop_heap(_RandomAccessIterator __first, _RandomAccessIterator __last)
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{
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_VSTD::pop_heap(__first, __last, __less<typename iterator_traits<_RandomAccessIterator>::value_type>());
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_POP_HEAP_H
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