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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___MEMORY_ADDRESSOF_H11#define _LIBCPP___MEMORY_ADDRESSOF_H12 13#include <__config>14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)16# pragma GCC system_header17#endif18 19_LIBCPP_BEGIN_NAMESPACE_STD20 21template <class _Tp>22inline _LIBCPP_CONSTEXPR_SINCE_CXX17 _LIBCPP_NO_CFI _LIBCPP_HIDE_FROM_ABI _Tp* addressof(_Tp& __x) _NOEXCEPT {23 return __builtin_addressof(__x);24}25 26#if __has_feature(objc_arc)27// Objective-C++ Automatic Reference Counting uses qualified pointers28// that require special addressof() signatures.29template <class _Tp>30inline _LIBCPP_HIDE_FROM_ABI __strong _Tp* addressof(__strong _Tp& __x) _NOEXCEPT {31 return &__x;32}33 34# if __has_feature(objc_arc_weak)35template <class _Tp>36inline _LIBCPP_HIDE_FROM_ABI __weak _Tp* addressof(__weak _Tp& __x) _NOEXCEPT {37 return &__x;38}39# endif40 41template <class _Tp>42inline _LIBCPP_HIDE_FROM_ABI __autoreleasing _Tp* addressof(__autoreleasing _Tp& __x) _NOEXCEPT {43 return &__x;44}45 46template <class _Tp>47inline _LIBCPP_HIDE_FROM_ABI __unsafe_unretained _Tp* addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT {48 return &__x;49}50#endif51 52#if !defined(_LIBCPP_CXX03_LANG)53template <class _Tp>54_Tp* addressof(const _Tp&&) noexcept = delete;55#endif56 57_LIBCPP_END_NAMESPACE_STD58 59#endif // _LIBCPP___MEMORY_ADDRESSOF_H60