token_def</span><span class="special">&lt;</span><span class="keyword">unsigned</span> <span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">constant</span><span class="special">;</span>
</pre>
<p>
          </p>
<p>
            As the parsers generated by <span class="emphasis"><em>Spirit.Qi</em></span> are fully
            attributed, any <span class="emphasis"><em>Spirit.Qi</em></span> parser component needs
            to expose a certain type as its parser attribut