
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">roman</span> <span class="special">:</span> <span class="keyword">public</span> <span class="identifier">grammar</span><span class="special">&lt;</span><span class="identifier">roman</span><span class="special">&gt;</span>
<span class="special">{</span>
    <span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">ScannerT</span><span class="sp