part of the complex number to generate its output. If
          there are more elements in our attribute than needed, we now can safely
          omit them from the grammar (which is a new 'feature' added to <a href="http://boost-spirit.com" target="_top">Spirit</a>
          in V1.43 as well). Note, we could have written the alternative as
        </p>
<pre class="programlisting"><span class="special">&amp;</span><span class="identifier">false_</span> <span class="special">&lt;&lt;</span> <span class="iden