="programlisting"><span class="identifier">rule</span><span class="special">&lt;</span><span class="identifier">Iterator</span><span class="special">&gt;</span> <span class="identifier">r</span><span class="special">;</span>
</pre>
<p>
          At the very least, the rule needs to know the iterator type it will be
          working on. This rule cannot be used with <code class="computeroutput"><span class="identifier">phrase_parse</span></code>.
          It can only be used with the <code class="computero