span class="identifier">OutputIterator</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A1</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A2</span><span class="special">,</span> <span class="keyword">typename</span> <span class="identifier">A3</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">grammar</span><span class="special">;</span>
</pre>
<h6>
<a nam