pecial">&amp;</span><span class="identifier">true_</span> <span class="special">&lt;&lt;</span> <span class="string">"("</span> <span class="special">&lt;&lt;</span> <span class="identifier">double_</span> <span class="special">&lt;&lt;</span> <span class="string">", "</span> <span class="special">&lt;&lt;</span> <span class="identifier">double_</span> <span class="special">&lt;&lt;</span> <span class="string">")"</span>
</pre>
<p>
          This reads as: 'if the first (boolean) element of the supplied fus