{"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
        let single = |ty| smallvec![(ty, PrivateUninhabitedField(false))];
    ) -> impl ExactSizeIterator<Item = (Self::Ty, PrivateUninhabitedField)> {
        let tys: SmallVec<[_; 2]> = match ctor {