1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef _LIBCPP___TYPE_TRAITS_REMOVE_VOLATILE_H
10 #define _LIBCPP___TYPE_TRAITS_REMOVE_VOLATILE_H
11 
12 #include <__config>
13 
14 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
15 #  pragma GCC system_header
16 #endif
17 
18 _LIBCPP_BEGIN_NAMESPACE_STD
19 
20 #if __has_builtin(__remove_volatile)
21 template <class _Tp>
22 struct remove_volatile {
23   using type _LIBCPP_NODEBUG = __remove_volatile(_Tp);
24 };
25 
26 template <class _Tp>
27 using __remove_volatile_t = __remove_volatile(_Tp);
28 #else
29 template <class _Tp>
30 struct _LIBCPP_TEMPLATE_VIS remove_volatile {
31   typedef _Tp type;
32 };
33 template <class _Tp>
34 struct _LIBCPP_TEMPLATE_VIS remove_volatile<volatile _Tp> {
35   typedef _Tp type;
36 };
37 
38 template <class _Tp>
39 using __remove_volatile_t = typename remove_volatile<_Tp>::type;
40 #endif // __has_builtin(__remove_volatile)
41 
42 #if _LIBCPP_STD_VER >= 14
43 template <class _Tp>
44 using remove_volatile_t = __remove_volatile_t<_Tp>;
45 #endif
46 
47 _LIBCPP_END_NAMESPACE_STD
48 
49 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_VOLATILE_H
50