  p == p3: true
</span></span></span><span style="display:flex;"><span><span style="color:#75715e">*/</span>
</span></span></code></pre></div><h3 id="通道为-nil">
  通道为 nil
  <a class="anchor" href="#%e9%80%9a%e9%81%93%e4%b8%ba-nil">#</a>
</h3>
<div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-go" data-lang="go"><span style="display:flex;"><span><span style="color:#f92672">package</span> <span styl