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_ADD_POINTER_H 10 #define _LIBCPP___TYPE_TRAITS_ADD_POINTER_H 11 12 #include <__config> 13 #include <__type_traits/is_referenceable.h> 14 #include <__type_traits/is_void.h> 15 #include <__type_traits/remove_reference.h> 16 17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18 # pragma GCC system_header 19 #endif 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 #if !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__add_pointer) 24 25 template <class _Tp> 26 using __add_pointer_t = __add_pointer(_Tp); 27 28 #else 29 template <class _Tp, bool = __libcpp_is_referenceable<_Tp>::value || is_void<_Tp>::value> 30 struct __add_pointer_impl { 31 typedef _LIBCPP_NODEBUG __libcpp_remove_reference_t<_Tp>* type; 32 }; 33 template <class _Tp> 34 struct __add_pointer_impl<_Tp, false> { 35 typedef _LIBCPP_NODEBUG _Tp type; 36 }; 37 38 template <class _Tp> 39 using __add_pointer_t = typename __add_pointer_impl<_Tp>::type; 40 41 #endif // !defined(_LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS) && __has_builtin(__add_pointer) 42 43 template <class _Tp> 44 struct add_pointer { 45 using type _LIBCPP_NODEBUG = __add_pointer_t<_Tp>; 46 }; 47 48 #if _LIBCPP_STD_VER >= 14 49 template <class _Tp> 50 using add_pointer_t = __add_pointer_t<_Tp>; 51 #endif 52 53 _LIBCPP_END_NAMESPACE_STD 54 55 #endif // _LIBCPP___TYPE_TRAITS_ADD_POINTER_H 56