objc: tweak my last patch to warn if class extension
has not overridden the property. // rdar://11656982


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158871 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index 32fbb04..13350ea 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -612,7 +612,6 @@
   bool warn = (Attributes & ObjCDeclSpec::DQ_PR_readonly);
   for (const ObjCCategoryDecl *CDecl = ClassDecl->getFirstClassExtension();
        CDecl; CDecl = CDecl->getNextClassExtension()) {
-    warn = false;
     ObjCPropertyDecl *ClassExtProperty = 0;
     for (ObjCContainerDecl::prop_iterator P = CDecl->prop_begin(),
          E = CDecl->prop_end(); P != E; ++P) {
@@ -622,6 +621,7 @@
       }
     }
     if (ClassExtProperty) {
+      warn = false;
       unsigned classExtPropertyAttr = 
         ClassExtProperty->getPropertyAttributesAsWritten();
       // We are issuing the warning that we postponed because class extensions
diff --git a/test/SemaObjC/tentative-property-decl.m b/test/SemaObjC/tentative-property-decl.m
index 4ab2f56..f69ac6d 100644
--- a/test/SemaObjC/tentative-property-decl.m
+++ b/test/SemaObjC/tentative-property-decl.m
@@ -15,6 +15,7 @@
 
 @interface MyClass : Super
 @property(nonatomic, copy, readonly) NSString *prop;
+@property(nonatomic, copy, readonly) id warnProp; // expected-warning {{property attributes 'readonly' and 'copy' are mutually exclusive}}
 @end
 
 @interface MyClass ()
@@ -23,11 +24,13 @@
 
 @implementation MyClass
 @synthesize prop;
+@synthesize warnProp;
 @end
 
 
 @protocol P
 @property(nonatomic, copy, readonly) NSString *prop;
+@property(nonatomic, copy, readonly) id warnProp; // expected-warning {{property attributes 'readonly' and 'copy' are mutually exclusive}}
 @end
 
 @interface YourClass : Super <P>
@@ -39,5 +42,6 @@
 
 @implementation YourClass 
 @synthesize prop;
+@synthesize warnProp;
 @end