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 # ifdef _LIBCPP_COMPILER_GCC 27 template <class _Tp> 28 using __remove_pointer_t = typename remove_pointer<_Tp>::type; 29 # else 30 template <class _Tp> 31 using __remove_pointer_t = __remove_pointer(_Tp); 32 # endif 33 #else 34 // clang-format off 35 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer {typedef _LIBCPP_NODEBUG _Tp type;}; 36 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*> {typedef _LIBCPP_NODEBUG _Tp type;}; 37 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const> {typedef _LIBCPP_NODEBUG _Tp type;}; 38 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile> {typedef _LIBCPP_NODEBUG _Tp type;}; 39 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _LIBCPP_NODEBUG _Tp type;}; 40 // clang-format on 41 42 template <class _Tp> 43 using __remove_pointer_t = typename remove_pointer<_Tp>::type; 44 #endif // !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__remove_pointer) 45 46 #if _LIBCPP_STD_VER >= 14 47 template <class _Tp> 48 using remove_pointer_t = __remove_pointer_t<_Tp>; 49 #endif 50 51 _LIBCPP_END_NAMESPACE_STD 52 53 #endif // _LIBCPP___TYPE_TRAITS_REMOVE_POINTER_H 54