Pass class to annotation visitor

trans/transpiler/phases/typing/common.py

@@ -13,9 +13,10 @@ PRELUDE = Scope.make_global()
 class ScoperVisitor(NodeVisitorSeq):
     scope: Scope = field(default_factory=lambda: PRELUDE.child(ScopeKind.GLOBAL))
     root_decls: Dict[str, VarDecl] = field(default_factory=dict)
+    cur_class: Optional[TypeType] = None
 
     def anno(self) -> "TypeAnnotationVisitor":
-        return TypeAnnotationVisitor(self.scope)
+        return TypeAnnotationVisitor(self.scope, self.cur_class)
 
     def visit_annotation(self, expr: Optional[ast.expr]) -> BaseType:
         return self.anno().visit(expr) if expr else TypeVariable()