ss="identifier">rule</span><span class="special">,</span> <span class="identifier">handler</span><span class="special">)</span>
</pre>
<p>
          This specifies that the handler will be called when a rule is matched successfully.
          The handler has the following signature:
        </p>
<pre class="programlisting"><span class="keyword">void</span> <span class="identifier">handler</span><span class="special">(</span>
	<span class="identifier">fusion</span><span class="special">::</span><span class="