Implement a warning diagnostic for weak vtables. Fixes PR6116.

llvm-svn: 95472

1 files changed, 21 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/warn-weak-vtables.cpp b/clang/test/SemaCXX/warn-weak-vtables.cpp
new file mode 100644
index 00000000000..1ea88a548e7
--- /dev/null
+++ b/clang/test/SemaCXX/warn-weak-vtables.cpp
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify -Wweak-vtables
+
+struct A { // expected-warning {{'A' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
+  virtual void f() { } 
+};
+
+template<typename T> struct B {
+  virtual void f() { } 
+};
+
+namespace {
+  struct C { 
+    virtual void f() { }
+  };
+}
+
+void f() {
+  struct A {
+    virtual void f() { }
+  };
+}
\ No newline at end of file