template <class _Tp> struct __libcpp_is_pointer : public false_type {};
template <class _Tp> struct __libcpp_is_pointer<_Tp*> : public true_type {};
+#if defined(_LIBCPP_HAS_OBJC_ARC)
+template <class _Tp> struct __libcpp_is_pointer<_Tp* __weak> : public true_type {};
+template <class _Tp> struct __libcpp_is_pointer<_Tp* __autoreleasing> : public true_type {};
+template <class _Tp> struct __libcpp_is_pointer<_Tp* __unsafe_unretained> : public true_type {};
+#endif
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_pointer
: public __libcpp_is_pointer<typename remove_cv<_Tp>::type> {};
--- /dev/null
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: c++98, c++03
+
+// <type_traits>
+
+// std::is_pointer
+
+// Test that we correctly handle Objective-C++ ARC qualifiers on pointers.
+
+#include <type_traits>
+
+
+template <typename T>
+void test() {
+ static_assert(std::is_pointer<T __weak>::value, "");
+ static_assert(std::is_pointer<T __strong>::value, "");
+ static_assert(std::is_pointer<T __autoreleasing>::value, "");
+ static_assert(std::is_pointer<T __unsafe_unretained>::value, "");
+
+ static_assert(std::is_pointer<T __weak const>::value, "");
+ static_assert(std::is_pointer<T __strong const>::value, "");
+ static_assert(std::is_pointer<T __autoreleasing const>::value, "");
+ static_assert(std::is_pointer<T __unsafe_unretained const>::value, "");
+
+ static_assert(std::is_pointer<T __weak volatile>::value, "");
+ static_assert(std::is_pointer<T __strong volatile>::value, "");
+ static_assert(std::is_pointer<T __autoreleasing volatile>::value, "");
+ static_assert(std::is_pointer<T __unsafe_unretained volatile>::value, "");
+
+ static_assert(std::is_pointer<T __weak const volatile>::value, "");
+ static_assert(std::is_pointer<T __strong const volatile>::value, "");
+ static_assert(std::is_pointer<T __autoreleasing const volatile>::value, "");
+ static_assert(std::is_pointer<T __unsafe_unretained const volatile>::value, "");
+}
+
+@class Foo;
+
+int main(int, char**) {
+ test<id>();
+ test<id const>();
+ test<id volatile>();
+ test<id const volatile>();
+ test<Foo*>();
+ test<Foo const*>();
+ test<Foo volatile*>();
+ test<Foo const volatile*>();
+
+ return 0;
+}