protected function get()
    {
        $c               = $this->lookAhead;
        $this->lookAhead = null;
        if ($c === null) {
            if ($this->inputIndex < $this->inputLength) {
                $c = $this->input[$this->inputIndex];
                $this->inputIndex += 1;
            } else {
                return;
            }
        }
        if ($c === "\r" || $c === "\n") {
            return "\n";
        }
        if (ord($c) < self::ORD_SPACE) {
            return ' ';
        }
        return $c;
    }