tput"><span class="identifier">fixed_size_queue</span></code>
                  is a template with a <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span></code>
                  parameter that specified the queue size. It is your responsibility
                  to ensure that <code class="computeroutput"><span class="identifier">N</span></code>
                  is big enough for your parser. Whenever the foremost iterator is