objc-arc: diagnose synthesis of a 'weak unavailable' property.
// rdar://10535245
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146272 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index c47a305..e754e73 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -648,13 +648,21 @@
Qualifiers::ObjCLifetime lifetime =
getImpliedARCOwnership(kind, PropertyIvarType);
assert(lifetime && "no lifetime for property?");
-
- if (lifetime == Qualifiers::OCL_Weak &&
- !getLangOptions().ObjCRuntimeHasWeak) {
- Diag(PropertyLoc, diag::err_arc_weak_no_runtime);
- Diag(property->getLocation(), diag::note_property_declare);
+ if (lifetime == Qualifiers::OCL_Weak) {
+ bool err = false;
+ if (const ObjCObjectPointerType *ObjT =
+ PropertyIvarType->getAs<ObjCObjectPointerType>())
+ if (ObjT->getInterfaceDecl()->isArcWeakrefUnavailable()) {
+ Diag(PropertyLoc, diag::err_arc_weak_unavailable_property);
+ Diag(property->getLocation(), diag::note_property_declare);
+ err = true;
+ }
+ if (!err && !getLangOptions().ObjCRuntimeHasWeak) {
+ Diag(PropertyLoc, diag::err_arc_weak_no_runtime);
+ Diag(property->getLocation(), diag::note_property_declare);
+ }
}
-
+
Qualifiers qs;
qs.addObjCLifetime(lifetime);
PropertyIvarType = Context.getQualifiedType(PropertyIvarType, qs);