_phrase__phrase_role__special______phrase__phrase_role__identifier__function4__phrase___code___what_does_this_mean_">I'm
      getting a compilation error mentioning <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">function</span></code>
      and/or <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">function4</span></code>. What does this mean?</a>
    </h4>
<p>
  