ntifier">error_code</span> <span class="identifier">ec</span><span class="special">;</span>
<span class="identifier">socket</span><span class="special">.</span><span class="identifier">io_control</span><span class="special">(</span><span class="identifier">command</span><span class="special">,</span> <span class="identifier">ec</span><span class="special">);</span>
<span class="keyword">if</span> <span class="special">(</span><span class="identifier">ec</span><span class="special">)</span>
<span class="spec