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.
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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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___ITERATOR_PROJECTED_H
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#define _LIBCPP___ITERATOR_PROJECTED_H
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/incrementable_traits.h> // iter_difference_t
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#include <__type_traits/remove_cvref.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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#if _LIBCPP_STD_VER >= 20
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template <class _It, class _Proj>
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struct __projected_impl {
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struct __type {
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using value_type = remove_cvref_t<indirect_result_t<_Proj&, _It>>;
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indirect_result_t<_Proj&, _It> operator*() const; // not defined
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};
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};
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template <weakly_incrementable _It, class _Proj>
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struct __projected_impl<_It, _Proj> {
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struct __type {
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using value_type = remove_cvref_t<indirect_result_t<_Proj&, _It>>;
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using difference_type = iter_difference_t<_It>;
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indirect_result_t<_Proj&, _It> operator*() const; // not defined
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};
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};
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// Note that we implement std::projected in a way that satisfies P2538R1 even in standard
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// modes before C++26 to avoid breaking the ABI between standard modes (even though ABI
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// breaks with std::projected are expected to have essentially no impact).
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template <indirectly_readable _It, indirectly_regular_unary_invocable<_It> _Proj>
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using projected = typename __projected_impl<_It, _Proj>::__type;
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ITERATOR_PROJECTED_H
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