Fix -Woverloaded-virtual when the using statement refers to a base declaration of a virtual function.

GCC and Clang both do not warn on:

  struct a { virtual void func(); };
  struct b: a { virtual void func(); void func(int); };
  struct c: b { void func(int); using b::func; };

but if the "using" was using a::func GCC would still remain silent where Clang
would warn. This change makes Clang consistent with GCC's existing behavior.

llvm-svn: 166154

1 files changed, 16 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/warn-overloaded-virtual.cpp b/clang/test/SemaCXX/warn-overloaded-virtual.cpp
index 8e2b671bf49..79635a62f8a 100644
--- a/clang/test/SemaCXX/warn-overloaded-virtual.cpp
+++ b/clang/test/SemaCXX/warn-overloaded-virtual.cpp
@@ -64,3 +64,19 @@ public:
   static void f() {}
 };
 }
+
+namespace ThreeLayer {
+struct A {
+  virtual void f();
+};
+
+struct B: A {
+  void f();
+  void f(int);
+};
+
+struct C: B {
+  void f(int);
+  using A::f;
+};
+}