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ce7771902d
This patch updates the includes guards of the C++ 03 headers. This is part of https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc.
91 lines
3.4 KiB
C++
91 lines
3.4 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___CXX03___ALGORITHM_PARTITION_H
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#define _LIBCPP___CXX03___ALGORITHM_PARTITION_H
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#include <__cxx03/__algorithm/iterator_operations.h>
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#include <__cxx03/__config>
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#include <__cxx03/__iterator/iterator_traits.h>
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#include <__cxx03/__utility/move.h>
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#include <__cxx03/__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 <__cxx03/__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___CXX03___ALGORITHM_PARTITION_H
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