 <span class="identifier">r</span><span class="special">;</span>
</pre>
<p>
          This type of rule can be used for both <code class="computeroutput"><span class="identifier">phrase_parse</span></code>
          and <code class="computeroutput"><span class="identifier">parse</span></code>.
        </p>
<p>
          For our next example, there's one more rule form you should know about:
        </p>
<pre class="programlisting"><span class="identifier">rule</span><span class="special">&lt;</span><span cl