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.
106 lines
3.6 KiB
C++
106 lines
3.6 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_SET_UNION_H
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#define _LIBCPP___ALGORITHM_SET_UNION_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/copy.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 _InIter1, class _InIter2, class _OutIter>
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struct __set_union_result {
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_InIter1 __in1_;
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_InIter2 __in2_;
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_OutIter __out_;
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// need a constructor as C++03 aggregate init is hard
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
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__set_union_result(_InIter1&& __in_iter1, _InIter2&& __in_iter2, _OutIter&& __out_iter)
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: __in1_(std::move(__in_iter1)), __in2_(std::move(__in_iter2)), __out_(std::move(__out_iter)) {}
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};
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template <class _AlgPolicy, class _Compare, class _InIter1, class _Sent1, class _InIter2, class _Sent2, class _OutIter>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 __set_union_result<_InIter1, _InIter2, _OutIter> __set_union(
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_InIter1 __first1, _Sent1 __last1, _InIter2 __first2, _Sent2 __last2, _OutIter __result, _Compare&& __comp) {
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for (; __first1 != __last1; ++__result) {
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if (__first2 == __last2) {
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auto __ret1 = std::__copy<_AlgPolicy>(std::move(__first1), std::move(__last1), std::move(__result));
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return __set_union_result<_InIter1, _InIter2, _OutIter>(
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std::move(__ret1.first), std::move(__first2), std::move((__ret1.second)));
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}
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if (__comp(*__first2, *__first1)) {
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*__result = *__first2;
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++__first2;
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} else {
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if (!__comp(*__first1, *__first2)) {
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++__first2;
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}
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*__result = *__first1;
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++__first1;
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}
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}
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auto __ret2 = std::__copy<_AlgPolicy>(std::move(__first2), std::move(__last2), std::move(__result));
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return __set_union_result<_InIter1, _InIter2, _OutIter>(
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std::move(__first1), std::move(__ret2.first), std::move((__ret2.second)));
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}
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template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator set_union(
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_InputIterator1 __first1,
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_InputIterator1 __last1,
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_InputIterator2 __first2,
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_InputIterator2 __last2,
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_OutputIterator __result,
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_Compare __comp) {
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return std::__set_union<_ClassicAlgPolicy, __comp_ref_type<_Compare> >(
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std::move(__first1),
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std::move(__last1),
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std::move(__first2),
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std::move(__last2),
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std::move(__result),
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__comp)
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.__out_;
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}
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template <class _InputIterator1, class _InputIterator2, class _OutputIterator>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator set_union(
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_InputIterator1 __first1,
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_InputIterator1 __last1,
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_InputIterator2 __first2,
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_InputIterator2 __last2,
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_OutputIterator __result) {
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return std::set_union(
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std::move(__first1),
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std::move(__last1),
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std::move(__first2),
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std::move(__last2),
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std::move(__result),
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__less<>());
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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_SET_UNION_H
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