{"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"ty::Uint(ty::UintTy::Usize)"}]}
        ty::Uint(ty::UintTy::Usize) | ty::Int(ty::IntTy::Isize) => None,
    match t.kind() {
        ty::Uint(_) => Some(Integer::fit_unsigned(val).uint_ty_str()),