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
22template <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