mirror of
https://github.com/capstone-engine/llvm-capstone.git
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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
82 lines
2.2 KiB
C++
82 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_PARTITION_H
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#define _LIBCPP___ALGORITHM_PARTITION_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 _Predicate, class _ForwardIterator>
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_LIBCPP_CONSTEXPR_AFTER_CXX17 _ForwardIterator
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__partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred, forward_iterator_tag)
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{
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while (true)
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{
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if (__first == __last)
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return __first;
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if (!__pred(*__first))
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break;
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++__first;
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}
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for (_ForwardIterator __p = __first; ++__p != __last;)
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{
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if (__pred(*__p))
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{
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swap(*__first, *__p);
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++__first;
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}
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}
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return __first;
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}
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template <class _Predicate, class _BidirectionalIterator>
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_LIBCPP_CONSTEXPR_AFTER_CXX17 _BidirectionalIterator
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__partition(_BidirectionalIterator __first, _BidirectionalIterator __last, _Predicate __pred,
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bidirectional_iterator_tag)
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{
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while (true)
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{
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while (true)
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{
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if (__first == __last)
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return __first;
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if (!__pred(*__first))
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break;
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++__first;
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}
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do
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{
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if (__first == --__last)
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return __first;
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} while (!__pred(*__last));
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swap(*__first, *__last);
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++__first;
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}
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}
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template <class _ForwardIterator, class _Predicate>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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_ForwardIterator
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partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred)
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{
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return _VSTD::__partition<_Predicate&>(
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__first, __last, __pred, typename iterator_traits<_ForwardIterator>::iterator_category());
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_PARTITION_H
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