a forward class declaration matching a typedef name of a class
refers to the underlying class.
This is radar 6859726. Steve, please read the radar for my rational.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71181 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 0e655a4..27f1277 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -1075,6 +1075,13 @@
Diag(AtClassLoc, diag::err_redefinition_different_kind) << IdentList[i];
Diag(PrevDecl->getLocation(), diag::note_previous_definition);
}
+ else if (TDD) {
+ // a forward class declaration matching a typedef name of a class
+ // refers to the underlying class.
+ if (ObjCInterfaceType * OI =
+ dyn_cast<ObjCInterfaceType>(TDD->getUnderlyingType()))
+ PrevDecl = OI->getDecl();
+ }
}
ObjCInterfaceDecl *IDecl = dyn_cast_or_null<ObjCInterfaceDecl>(PrevDecl);
if (!IDecl) { // Not already seen? Make a forward decl.