invert_actions)
          </li>
<li class="listitem">
            Create new expression using current expression tag, what is done by
            <a href="http://www.boost.org/doc/libs/release/doc/html/boost/proto/_.html" target="_top"><code class="computeroutput"><span class="identifier">proto</span><span class="special">::</span><span class="identifier">_</span></code></a>, with the result of evaluated
            arguments
          </li>
</ul></div>
<p>
        So, after the basics are set up, we can st