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.
82 lines
2.4 KiB
C++
82 lines
2.4 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_READABLE_TRAITS_H
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#define _LIBCPP___ITERATOR_READABLE_TRAITS_H
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#include <__concepts/same_as.h>
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#include <__config>
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#include <__type_traits/conditional.h>
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#include <__type_traits/is_array.h>
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#include <__type_traits/is_object.h>
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#include <__type_traits/is_primary_template.h>
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#include <__type_traits/remove_cv.h>
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#include <__type_traits/remove_cvref.h>
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#include <__type_traits/remove_extent.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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// [readable.traits]
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template <class>
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struct __cond_value_type {};
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template <class _Tp>
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requires is_object_v<_Tp>
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struct __cond_value_type<_Tp> {
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using value_type = remove_cv_t<_Tp>;
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};
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template <class _Tp>
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concept __has_member_value_type = requires { typename _Tp::value_type; };
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template <class _Tp>
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concept __has_member_element_type = requires { typename _Tp::element_type; };
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template <class>
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struct indirectly_readable_traits {};
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template <class _Ip>
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requires is_array_v<_Ip>
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struct indirectly_readable_traits<_Ip> {
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using value_type = remove_cv_t<remove_extent_t<_Ip>>;
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};
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template <class _Ip>
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struct indirectly_readable_traits<const _Ip> : indirectly_readable_traits<_Ip> {};
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template <class _Tp>
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struct indirectly_readable_traits<_Tp*> : __cond_value_type<_Tp> {};
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template <__has_member_value_type _Tp>
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struct indirectly_readable_traits<_Tp> : __cond_value_type<typename _Tp::value_type> {};
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template <__has_member_element_type _Tp>
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struct indirectly_readable_traits<_Tp> : __cond_value_type<typename _Tp::element_type> {};
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template <__has_member_value_type _Tp>
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requires __has_member_element_type<_Tp>
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struct indirectly_readable_traits<_Tp> {};
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template <__has_member_value_type _Tp>
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requires __has_member_element_type<_Tp> &&
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same_as<remove_cv_t<typename _Tp::element_type>, remove_cv_t<typename _Tp::value_type>>
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struct indirectly_readable_traits<_Tp> : __cond_value_type<typename _Tp::value_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_READABLE_TRAITS_H
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