{"ast_node_type":"other","tokens":[{"end":47,"kind":"keyword","start":0,"text":"Ok(Some((repr,"}]}
            Ok(Some((repr, _))) => match repr {
            Err(AbiMismatch) | Ok(None) => BackendRepr::Memory { sized: true },
                // Mismatched alignment (e.g. union is #[repr(packed)]): disable opt