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.
128 lines
4.7 KiB
C++
128 lines
4.7 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_UNIQUE_COPY_H
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#define _LIBCPP___ALGORITHM_UNIQUE_COPY_H
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#include <__algorithm/comp.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 <__type_traits/conditional.h>
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#include <__type_traits/is_base_of.h>
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#include <__type_traits/is_same.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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namespace __unique_copy_tags {
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struct __reread_from_input_tag {};
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struct __reread_from_output_tag {};
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struct __read_from_tmp_value_tag {};
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} // namespace __unique_copy_tags
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template <class _AlgPolicy, class _BinaryPredicate, class _InputIterator, class _Sent, class _OutputIterator>
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_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _OutputIterator>
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__unique_copy(_InputIterator __first,
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_Sent __last,
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_OutputIterator __result,
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_BinaryPredicate&& __pred,
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__unique_copy_tags::__read_from_tmp_value_tag) {
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if (__first != __last) {
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typename _IterOps<_AlgPolicy>::template __value_type<_InputIterator> __t(*__first);
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*__result = __t;
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++__result;
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while (++__first != __last) {
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if (!__pred(__t, *__first)) {
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__t = *__first;
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*__result = __t;
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++__result;
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}
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}
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}
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return pair<_InputIterator, _OutputIterator>(std::move(__first), std::move(__result));
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}
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template <class _AlgPolicy, class _BinaryPredicate, class _ForwardIterator, class _Sent, class _OutputIterator>
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_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pair<_ForwardIterator, _OutputIterator>
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__unique_copy(_ForwardIterator __first,
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_Sent __last,
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_OutputIterator __result,
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_BinaryPredicate&& __pred,
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__unique_copy_tags::__reread_from_input_tag) {
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if (__first != __last) {
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_ForwardIterator __i = __first;
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*__result = *__i;
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++__result;
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while (++__first != __last) {
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if (!__pred(*__i, *__first)) {
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*__result = *__first;
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++__result;
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__i = __first;
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}
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}
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}
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return pair<_ForwardIterator, _OutputIterator>(std::move(__first), std::move(__result));
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}
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template <class _AlgPolicy, class _BinaryPredicate, class _InputIterator, class _Sent, class _InputAndOutputIterator>
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_LIBCPP_CONSTEXPR_SINCE_CXX20 _LIBCPP_HIDE_FROM_ABI pair<_InputIterator, _InputAndOutputIterator>
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__unique_copy(_InputIterator __first,
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_Sent __last,
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_InputAndOutputIterator __result,
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_BinaryPredicate&& __pred,
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__unique_copy_tags::__reread_from_output_tag) {
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if (__first != __last) {
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*__result = *__first;
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while (++__first != __last)
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if (!__pred(*__result, *__first))
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*++__result = *__first;
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++__result;
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}
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return pair<_InputIterator, _InputAndOutputIterator>(std::move(__first), std::move(__result));
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}
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template <class _InputIterator, class _OutputIterator, class _BinaryPredicate>
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
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unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result, _BinaryPredicate __pred) {
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using __algo_tag = __conditional_t<
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is_base_of<forward_iterator_tag, typename iterator_traits<_InputIterator>::iterator_category>::value,
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__unique_copy_tags::__reread_from_input_tag,
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__conditional_t<
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is_base_of<forward_iterator_tag, typename iterator_traits<_OutputIterator>::iterator_category>::value &&
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is_same< typename iterator_traits<_InputIterator>::value_type,
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typename iterator_traits<_OutputIterator>::value_type>::value,
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__unique_copy_tags::__reread_from_output_tag,
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__unique_copy_tags::__read_from_tmp_value_tag> >;
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return std::__unique_copy<_ClassicAlgPolicy>(
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std::move(__first), std::move(__last), std::move(__result), __pred, __algo_tag())
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.second;
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}
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template <class _InputIterator, class _OutputIterator>
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
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unique_copy(_InputIterator __first, _InputIterator __last, _OutputIterator __result) {
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return std::unique_copy(std::move(__first), std::move(__last), std::move(__result), __equal_to());
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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_UNIQUE_COPY_H
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