{"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"(Some(t_from),"}]}
                (Some(t_from), Some(t_cast)) => (t_from, t_cast),
            match (CastTy::from_ty(table, &self.expr_ty), CastTy::from_ty(table, &self.cast_ty)) {
                (None, Some(t_cast)) => match self.expr_ty.kind(Interner) {