lass="special">&gt;</span> <span class="identifier">r</span><span class="special">;</span>
</pre>
<p>
          Example:
        </p>
<pre class="programlisting"><span class="identifier">rule</span><span class="special">&lt;</span><span class="identifier">std</span><span class="special">::</span><span class="identifier">string</span><span class="special">::</span><span class="identifier">iterator</span><span class="special">,</span> <span class="identifier">space_type</span><span class="special">&gt;</span>