</li>
</ul></div>
<p>
        After you know what is going on, maybe the rest doesn't look so scary anymore:
      </p>
<pre class="programlisting"><span class="comment">// Transform minus to plus</span>
<span class="keyword">template</span> <span class="special">&lt;&gt;</span>
<span class="keyword">struct</span> <span class="identifier">invert_actions</span><span class="special">::</span><span class="identifier">when</span><span class="special">&lt;</span><span class="identifier">phoenix</span><span class