
<p>
            Generally, for <a href="../../../../../../../libs/bind/index.html" target="_top">Boost.Bind</a>,
            use <code class="computeroutput"><span class="special">::</span><span class="identifier">_1</span></code>,
            <code class="computeroutput"><span class="special">::</span><span class="identifier">_2</span></code>,
            etc. (yes, these placeholders are defined in the global namespace).
          </p>
<p>
            For <a href="../../../../../../../libs/lambda/index.h