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)
21template <class _Tp>
22struct remove_pointer {
23  using type _LIBCPP_NODEBUG = __remove_pointer(_Tp);
24};
25
26template <class _Tp>
27using __remove_pointer_t = __remove_pointer(_Tp);
28#else
29// clang-format off
30template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer                      {typedef _LIBCPP_NODEBUG _Tp type;};
31template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*>                {typedef _LIBCPP_NODEBUG _Tp type;};
32template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const>          {typedef _LIBCPP_NODEBUG _Tp type;};
33template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile>       {typedef _LIBCPP_NODEBUG _Tp type;};
34template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _LIBCPP_NODEBUG _Tp type;};
35// clang-format on
36
37template <class _Tp>
38using __remove_pointer_t = typename remove_pointer<_Tp>::type;
39#endif // !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__remove_pointer)
40
41#if _LIBCPP_STD_VER >= 14
42template <class _Tp>
43using remove_pointer_t = __remove_pointer_t<_Tp>;
44#endif
45
46_LIBCPP_END_NAMESPACE_STD
47
48#endif // _LIBCPP___TYPE_TRAITS_REMOVE_POINTER_H
49