{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"ty::Tuple(fields)"}]}
        ty::Tuple(fields) if fields.is_empty() => Some(true),
        ty::FnDef(..) | ty::Never => Some(true),
        ty::Array(_ty, len) if let Some(0) = len.try_to_target_usize(tcx) => Some(true),