// WARN: This file is auto generated by flood-tide-gen
match CmdOp::from(nv.opt.num) {
    CmdOp::Head => {
        conf.opt_head = Some(value_to_usize(nv)?);
    }
    CmdOp::Tail => {
        conf.opt_tail = Some(value_to_usize(nv)?);
    }
    CmdOp::Inverse => {
        conf.flg_inverse = true;
    }
    CmdOp::Help => {
        conf.flg_help = true;
    }
    CmdOp::Version => {
        conf.flg_version = true;
    }
}