{"ast_node_type":"other","tokens":[{"end":94,"kind":"keyword","start":0,"text":"patterns.iter().map(|pat|"}]}
        patterns.iter().map(|pat| MatchArm { pat, has_guard: false, arm_data: () }).collect();
    let arms: Vec<_> =
    compute_match_usefulness(arms.as_slice(), ty, PlaceValidity::ValidOnly, complexity_limit, false)