an><span class="special">::</span><span class="identifier">skip</span><span class="special">(</span><span class="identifier">first</span><span class="special">,</span> <span class="identifier">last</span><span class="special">,</span> <span class="identifier">skipper</span><span class="special">);</span>
</pre>
<p>
        </p>
<p>
          to do a pre-skip. After pre-skipping, the parser proceeds to do its thing.
          The actual parsing code is placed in <code class="computeroutput"><span class="iden