| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___TYPE_TRAITS_IS_POINTER_H |
| #define _LIBCPP___TYPE_TRAITS_IS_POINTER_H |
| |
| #include <__config> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/remove_cv.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| // Before AppleClang 12.0.5, __is_pointer didn't work for Objective-C types. |
| #if __has_keyword(__is_pointer) && \ |
| !(defined(_LIBCPP_APPLE_CLANG_VER) && _LIBCPP_APPLE_CLANG_VER < 1205) |
| |
| template<class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_pointer : _BoolConstant<__is_pointer(_Tp)> { }; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| inline constexpr bool is_pointer_v = __is_pointer(_Tp); |
| #endif |
| |
| #else // __has_keyword(__is_pointer) |
| |
| template <class _Tp> struct __libcpp_is_pointer : public false_type {}; |
| template <class _Tp> struct __libcpp_is_pointer<_Tp*> : public true_type {}; |
| |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers { typedef _Tp type; }; |
| #if defined(_LIBCPP_HAS_OBJC_ARC) |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __strong> { typedef _Tp type; }; |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __weak> { typedef _Tp type; }; |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __autoreleasing> { typedef _Tp type; }; |
| template <class _Tp> struct __libcpp_remove_objc_qualifiers<_Tp __unsafe_unretained> { typedef _Tp type; }; |
| #endif |
| |
| template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pointer |
| : public __libcpp_is_pointer<typename __libcpp_remove_objc_qualifiers<typename remove_cv<_Tp>::type>::type> {}; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <class _Tp> |
| inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; |
| #endif |
| |
| #endif // __has_keyword(__is_pointer) |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_IS_POINTER_H |