roman</span> <span class="special">:</span> <span class="identifier">qi</span><span class="special">::</span><span class="identifier">grammar</span><span class="special">&lt;</span><span class="identifier">Iterator</span><span class="special">,</span> <span class="keyword">unsigned</span><span class="special">()&gt;</span>
<span class="special">{</span>
    <span class="identifier">roman</span><span class="special">()</span> <span class="special">:</span> <span class="identifier">roman</span><span class="sp