368faacac7
This commit reverts 5aaefa51 (and also partly 7f285f48e77 and b6d75682f9, which were related to the original commit). As landed, 5aaefa51 had unintended consequences on some downstream bots and didn't have proper coverage upstream due to a few subtle things. Implementing this is something we should do in libc++, however we'll first need to address a few issues listed in https://reviews.llvm.org/D106124#3349710. Differential Revision: https://reviews.llvm.org/D120683
77 lines
1.8 KiB
C++
77 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___MEMORY_ADDRESSOF_H
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#define _LIBCPP___MEMORY_ADDRESSOF_H
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#include <__config>
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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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template <class _Tp>
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inline _LIBCPP_CONSTEXPR_AFTER_CXX14
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_LIBCPP_NO_CFI _LIBCPP_INLINE_VISIBILITY
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_Tp*
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addressof(_Tp& __x) _NOEXCEPT
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{
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return __builtin_addressof(__x);
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}
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#if defined(_LIBCPP_HAS_OBJC_ARC) && !defined(_LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF)
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// Objective-C++ Automatic Reference Counting uses qualified pointers
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// that require special addressof() signatures. When
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// _LIBCPP_PREDEFINED_OBJC_ARC_ADDRESSOF is defined, the compiler
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// itself is providing these definitions. Otherwise, we provide them.
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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__strong _Tp*
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addressof(__strong _Tp& __x) _NOEXCEPT
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{
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return &__x;
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}
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#ifdef _LIBCPP_HAS_OBJC_ARC_WEAK
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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__weak _Tp*
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addressof(__weak _Tp& __x) _NOEXCEPT
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{
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return &__x;
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}
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#endif
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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__autoreleasing _Tp*
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addressof(__autoreleasing _Tp& __x) _NOEXCEPT
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{
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return &__x;
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}
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template <class _Tp>
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inline _LIBCPP_INLINE_VISIBILITY
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__unsafe_unretained _Tp*
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addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT
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{
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return &__x;
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}
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#endif
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#if !defined(_LIBCPP_CXX03_LANG)
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template <class _Tp> _Tp* addressof(const _Tp&&) noexcept = delete;
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#endif
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___MEMORY_ADDRESSOF_H
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