{"ast_node_type":"variable","tokens":[{"end":76,"kind":"keyword","start":0,"text":"if"}]}
        if let Some(expected_ty) = expected.only_has_type(&mut self.table) {
        let ty = self.infer_expr_inner(tgt_expr, expected, is_read);
            let could_unify = self.unify(&ty, &expected_ty);