Fix <rdar://problem/6257675> error: member reference base type ('NSUserDefaults *') is not a structure or union.

Teach Sema::ActOnMemberReferenceExpr() to look through local category implementations associated with the class.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57995 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Sema/SemaExpr.cpp

@@ -977,6 +977,13 @@ ActOnMemberReferenceExpr(ExprTy *Base, SourceLocation OpLoc,
               ObjCImplementations[ClassDecl->getIdentifier()])
             Getter = ImpDecl->getInstanceMethod(Sel);
 
+    // Look through local category implementations associated with the class.
+    if (!Getter) {
+      for (unsigned i = 0; i < ObjCCategoryImpls.size() && !Getter; i++) {
+        if (ObjCCategoryImpls[i]->getClassInterface() == IFace)
+          Getter = ObjCCategoryImpls[i]->getInstanceMethod(Sel);
+      }
+    }
     if (Getter) {
       // If we found a getter then this may be a valid dot-reference, we
       // need to also look for the matching setter.

test/SemaObjC/property-11.m

@@ -0,0 +1,32 @@
+// RUN: clang -fsyntax-only -verify %s
+
+@interface NSSound
+@end
+@interface NSFont
+@end
+
+@interface NSSound (Adds)
+@end
+
+@implementation NSSound (Adds)
+- foo {
+  return self;
+}
+- (void)setFoo:obj {
+}
+@end
+
+@implementation NSFont (Adds)
+
+- xx {
+  NSSound *x;
+  id o;
+
+  o = [x foo]; 
+  o = x.foo;
+  [x setFoo:o];
+  x.foo = o;
+}
+
+@end
+