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