 parse a comma-delimited list of numbers. Such lists are common in parsing
        and Spirit provides a simpler shortcut for them. The expression above can
        be simplified to:
      </p>
<pre class="programlisting"><span class="identifier">double_</span> <span class="special">%</span> <span class="char">','</span>
</pre>
<p>
        read as: a list of doubles separated by <code class="computeroutput"><span class="char">','</span></code>.
      </p>
<p>
        This sample, again a variation of our pr