Warn if forward class is used as a receiver.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71278 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprObjC.cpp b/lib/Sema/SemaExprObjC.cpp
index e8ff18b..3dbc2cf 100644
--- a/lib/Sema/SemaExprObjC.cpp
+++ b/lib/Sema/SemaExprObjC.cpp
@@ -422,7 +422,15 @@
assert(ClassDecl && "missing interface declaration");
ObjCMethodDecl *Method = 0;
QualType returnType;
- Method = ClassDecl->lookupClassMethod(Context, Sel);
+ if (ClassDecl->isForwardDecl()) {
+ // A forward class used in messaging is tread as a 'Class'
+ Method = LookupFactoryMethodInGlobalPool(Sel, SourceRange(lbrac,rbrac));
+ if (Method)
+ Diag(lbrac, diag::warn_receiver_forward_class)
+ << ClassDecl->getDeclName();
+ }
+ if (!Method)
+ Method = ClassDecl->lookupClassMethod(Context, Sel);
// If we have an implementation in scope, check "private" methods.
if (!Method)