1 files changed, 65 insertions, 0 deletions
diff --git a/clang/test/CXX/conv/conv.mem/p4.cpp b/clang/test/CXX/conv/conv.mem/p4.cpp
new file mode 100644
index 0000000..e0748d8
--- /dev/null
+++ b/clang/test/CXX/conv/conv.mem/p4.cpp
@@ -0,0 +1,65 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+struct Base {
+  int data;
+  int method();
+};
+int (Base::*data_ptr) = &Base::data;
+int (Base::*method_ptr)() = &Base::method;
+
+namespace test0 {
+  struct Derived : Base {};
+  void test() {
+    int (Derived::*d) = data_ptr;
+    int (Derived::*m)() = method_ptr;
+  }
+}
+
+// Can't be inaccessible.
+namespace test1 {
+  struct Derived : private Base {}; // expected-note 2 {{declared private here}}
+  void test() {
+    int (Derived::*d) = data_ptr; // expected-error {{cannot cast private base class 'Base' to 'test1::Derived'}}
+    int (Derived::*m)() = method_ptr; // expected-error {{cannot cast private base class 'Base' to 'test1::Derived'}}
+  }
+};
+
+// Can't be ambiguous.
+namespace test2 {
+  struct A : Base {};
+  struct B : Base {};
+  struct Derived : A, B {};
+  void test() {
+    int (Derived::*d) = data_ptr; // expected-error {{ambiguous conversion from pointer to member of base class 'Base' to pointer to member of derived class 'test2::Derived':}}
+    int (Derived::*m)() = method_ptr; // expected-error {{ambiguous conversion from pointer to member of base class 'Base' to pointer to member of derived class 'test2::Derived':}}
+  }
+}
+
+// Can't be virtual.
+namespace test3 {
+  struct Derived : virtual Base {};
+  void test() {
+    int (Derived::*d) = data_ptr;  // expected-error {{conversion from pointer to member of class 'Base' to pointer to member of class 'test3::Derived' via virtual base 'Base' is not allowed}}
+    int (Derived::*m)() = method_ptr; // expected-error {{conversion from pointer to member of class 'Base' to pointer to member of class 'test3::Derived' via virtual base 'Base' is not allowed}}
+  }
+}
+
+// Can't be virtual even if there's a non-virtual path.
+namespace test4 {
+  struct A : Base {};
+  struct Derived : Base, virtual A {};
+  void test() {
+    int (Derived::*d) = data_ptr; // expected-error {{ambiguous conversion from pointer to member of base class 'Base' to pointer to member of derived class 'test4::Derived':}}
+    int (Derived::*m)() = method_ptr; // expected-error {{ambiguous conversion from pointer to member of base class 'Base' to pointer to member of derived class 'test4::Derived':}}
+  }
+}
+
+// PR6254: don't get thrown off by a virtual base.
+namespace test5 {
+  struct A {};
+  struct Derived : Base, virtual A {};
+  void test() {
+    int (Derived::*d) = data_ptr;
+    int (Derived::*m)() = method_ptr;
+  }
+}