 we have been working around the fact that <code class="computeroutput"><span class="identifier">std</span><span class="special">::</span><span class="identifier">complex</span><span class="special">&lt;&gt;</span></code> is not a native <a href="../../../../../../../libs/fusion/doc/html/index.html" target="_top">Boost.Fusion</a>
          sequence. We have not been able to use it with the same simplicity and
          natural grace of a <code class="computeroutput"><span class="identifier">fusion</span><sp