sites">Prerequisites</a>
        </h6>
<p>
          In addition to the main header file needed to include the core components
          implemented in <span class="emphasis"><em>Spirit.Qi</em></span> we add the header file needed
          for the new <code class="computeroutput"><span class="identifier">distinct</span></code> generator.
        </p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span cl