Warn about bogus protocol qualifiers.

llvm-svn: 65241

clang/include/clang/Basic/DiagnosticSemaKinds.def

@@ -1402,4 +1402,6 @@ DIAG(warn_objc_array_of_interfaces, WARNING,
      "array of interface %0 should probably be an array of pointers")
 DIAG(ext_c99_array_usage, EXTENSION,
      "use of C99-specific array features, accepted as an extension")
+DIAG(warn_ignoring_objc_qualifiers, WARNING,
+     "ignoring protocol qualifiers on non-ObjC type")
 

clang/lib/Sema/SemaType.cpp

@@ -151,6 +151,9 @@ QualType Sema::ConvertDeclSpecToType(const DeclSpec &DS) {
         // id<protocol-list>
         Result = Context.getObjCQualifiedIdType((ObjCProtocolDecl**)PQ,
                                                 DS.getNumProtocolQualifiers());
+      else
+        Diag(DS.getSourceRange().getBegin(), 
+             diag::warn_ignoring_objc_qualifiers) << DS.getSourceRange();
     }
     // TypeQuals handled by caller.
     break;

clang/test/SemaObjC/protocol-archane.m

@@ -21,4 +21,9 @@ void foo(id x) {
 
 // FIXME: provide a better diagnostic (no typedef).
 - (void)m2:(id <MyProtocol> short)arg1; // expected-error {{'short type-name' is invalid}}
-@end
+@end
+
+typedef int NotAnObjCObjectType;
+
+// GCC doesn't diagnose this.
+NotAnObjCObjectType <SomeProtocol> *obj; // expected-warning {{ignoring protocol qualifiers on non-ObjC type}}