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-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP___MEMORY_VOIDIFY_H 11 #define _LIBCPP___MEMORY_VOIDIFY_H 12 13 #include <__config> 14 #include <__memory/addressof.h> 15 16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17 # pragma GCC system_header 18 #endif 19 20 _LIBCPP_BEGIN_NAMESPACE_STD 21 22 template <typename _Tp> 23 _LIBCPP_ALWAYS_INLINE _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 void* __voidify(_Tp& __from) { 24 // Cast away cv-qualifiers to allow modifying elements of a range through const iterators. 25 return const_cast<void*>(static_cast<const volatile void*>(std::addressof(__from))); 26 } 27 28 _LIBCPP_END_NAMESPACE_STD 29 30 #endif // _LIBCPP___MEMORY_VOIDIFY_H 31