s="identifier">std</span><span class="special">::</span><span class="identifier">size_t</span><span class="special">)</span>
  <span class="special">{</span>
    <span class="comment">// Put the underlying socket into non-blocking mode.</span>
    <span class="keyword">if</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">sock_</span><span class="special">.</span>