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_POINTER_H
10 #define _LIBCPP___TYPE_TRAITS_REMOVE_POINTER_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 !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__remove_pointer)
21 template <class _Tp>
22 struct remove_pointer {
23   using type _LIBCPP_NODEBUG = __remove_pointer(_Tp);
24 };
25 
26 template <class _Tp>
27 using __remove_pointer_t = __remove_pointer(_Tp);
28 #else
29 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer                      {typedef _LIBCPP_NODEBUG _Tp type;};
30 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*>                {typedef _LIBCPP_NODEBUG _Tp type;};
31 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const>          {typedef _LIBCPP_NODEBUG _Tp type;};
32 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile>       {typedef _LIBCPP_NODEBUG _Tp type;};
33 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _LIBCPP_NODEBUG _Tp type;};
34 
35 template <class _Tp>
36 using __remove_pointer_t = typename remove_pointer<_Tp>::type;
37 #endif // !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__remove_pointer)
38 
39 #if _LIBCPP_STD_VER > 11
40 template <class _Tp> using remove_pointer_t = __remove_pointer_t<_Tp>;
41 #endif
42 
43 _LIBCPP_END_NAMESPACE_STD
44 
45 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_POINTER_H
46