ass="identifier">ip</span><span class="special">::</span><span class="identifier">tcp</span><span class="special">::</span><span class="identifier">v4</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="special">{</span>
  <span class="comment">// An error occurred.</span>
<span class="special">}</span>
</pre>
</div>
