Arg::Binary => self.binary = Tristate::True,
    Arg::Text => self.binary = Tristate::False,
    Arg::Tag => {
        self.binary = Tristate::Unset;
        self.tag = Tristate::True;
    }
    Arg::Untagged => {
        if self.tag == Tristate::True {
            self.binary = Tristate::Unset;
        }
        self.tag = Tristate::False;
    }