1 files changed, 43 insertions, 1 deletions
diff --git a/test/SemaCXX/MicrosoftExtensions.cpp b/test/SemaCXX/MicrosoftExtensions.cpp
index fb3107f44e..93650a53f4 100644
--- a/test/SemaCXX/MicrosoftExtensions.cpp
+++ b/test/SemaCXX/MicrosoftExtensions.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -fsyntax-only -verify -fms-extensions -fexceptions
+// RUN: %clang_cc1 %s -fsyntax-only -Wmicrosoft -verify -fms-extensions -fexceptions
 
 
 // ::type_info is predeclared with forward class declartion
@@ -30,6 +30,48 @@ struct Derived : Base {
   virtual void f3();
 };
 
+
+// MSVC allows type definition in anonymous union and struct
+struct A
+{
+  union 
+  {
+    int a;
+    struct B  // expected-warning {{types declared in an anonymous union are a Microsoft extension}}
+    { 
+      int c;
+    } d;
+
+    union C   // expected-warning {{types declared in an anonymous union are a Microsoft extension}}
+    {
+      int e;
+      int ee;
+    } f;
+
+    typedef int D;  // expected-warning {{types declared in an anonymous union are a Microsoft extension}}
+    struct F;  // expected-warning {{types declared in an anonymous union are a Microsoft extension}}
+  };
+
+  struct
+  {
+    int a2;
+
+    struct B2  // expected-warning {{types declared in an anonymous struct are a Microsoft extension}}
+    {
+      int c2;
+    } d2;
+    
+	union C2  // expected-warning {{types declared in an anonymous struct are a Microsoft extension}}
+    {
+      int e2;
+      int ee2;
+    } f2;
+
+    typedef int D2;  // expected-warning {{types declared in an anonymous struct are a Microsoft extension}}
+    struct F2;  // expected-warning {{types declared in an anonymous struct are a Microsoft extension}}
+  };
+};
+
 // __stdcall handling
 struct M {
     int __stdcall addP();