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e78f53d1e8
This reverts commit 68c04b0ae62d8431d72d8b47fc13008002ee4387. This disables the IWYU mapping that caused the failure, since the headers aren't reachable for now. This is the first part of the "Freezing C++03 headers" proposal explained in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58. This patch mechanically copies the headers as of the LLVM 19.1 release into a subdirectory of libc++ so that we can start using these headers when building in C++03 mode. We are going to be backporting important changes to that copy of the headers until the LLVM 21 release. After the LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy of the headers. This patch only performs a copy of the headers -- these headers are still unused by the rest of the codebase.
91 lines
3.3 KiB
C++
91 lines
3.3 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 <__algorithm/iterator_operations.h>
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#include <__config>
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#include <__iterator/iterator_traits.h>
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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_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <class _Predicate, class _AlgPolicy, class _ForwardIterator, class _Sentinel>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_ForwardIterator, _ForwardIterator>
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__partition_impl(_ForwardIterator __first, _Sentinel __last, _Predicate __pred, forward_iterator_tag) {
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while (true) {
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if (__first == __last)
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return std::make_pair(std::move(__first), std::move(__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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_ForwardIterator __p = __first;
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while (++__p != __last) {
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if (__pred(*__p)) {
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_IterOps<_AlgPolicy>::iter_swap(__first, __p);
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++__first;
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}
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}
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return std::make_pair(std::move(__first), std::move(__p));
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}
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template <class _Predicate, class _AlgPolicy, class _BidirectionalIterator, class _Sentinel>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_BidirectionalIterator, _BidirectionalIterator>
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__partition_impl(_BidirectionalIterator __first, _Sentinel __sentinel, _Predicate __pred, bidirectional_iterator_tag) {
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_BidirectionalIterator __original_last = _IterOps<_AlgPolicy>::next(__first, __sentinel);
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_BidirectionalIterator __last = __original_last;
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while (true) {
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while (true) {
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if (__first == __last)
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return std::make_pair(std::move(__first), std::move(__original_last));
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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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if (__first == --__last)
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return std::make_pair(std::move(__first), std::move(__original_last));
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} while (!__pred(*__last));
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_IterOps<_AlgPolicy>::iter_swap(__first, __last);
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++__first;
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}
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}
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template <class _AlgPolicy, class _ForwardIterator, class _Sentinel, class _Predicate, class _IterCategory>
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_ForwardIterator, _ForwardIterator>
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__partition(_ForwardIterator __first, _Sentinel __last, _Predicate&& __pred, _IterCategory __iter_category) {
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return std::__partition_impl<__remove_cvref_t<_Predicate>&, _AlgPolicy>(
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std::move(__first), std::move(__last), __pred, __iter_category);
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}
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template <class _ForwardIterator, class _Predicate>
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _ForwardIterator
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partition(_ForwardIterator __first, _ForwardIterator __last, _Predicate __pred) {
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using _IterCategory = typename iterator_traits<_ForwardIterator>::iterator_category;
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auto __result = std::__partition<_ClassicAlgPolicy>(std::move(__first), std::move(__last), __pred, _IterCategory());
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return __result.first;
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}
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_PARTITION_H
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