{"ast_node_type":"struct","tokens":[{"end":91,"kind":"keyword","start":0,"text":"//"}]}
            // the tuple struct pattern. Otherwise the args could get out of range on e.g.,
            // #67037: only do this if we could successfully type-check the expected type against
            // `let P() = U;` where `P != U` with `struct P<T>(T);`.