{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"(Immediate::Uninit,"}]}
            (Immediate::Uninit, _) => Immediate::Uninit,
            // If the entire value is uninit, then so is the field (can happen in ConstProp).
            // If the field is uninhabited, we can forget the data (can happen in ConstProp).