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>
__voidify(_Tp & __from)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