.42.19.6.4"></a><h2>Description</h2>
<p>Store this hook in a class to be inserted in an list.</p>
<p>The hook admits the following options: <code class="computeroutput">void_pointer&lt;&gt;</code> and <code class="computeroutput">link_mode&lt;&gt;</code>.</p>
<p><code class="computeroutput">link_mode&lt;&gt;</code> will specify the linking mode of the hook (<code class="computeroutput">normal_link</code>, <code class="computeroutput">auto_unlink</code> or <code class="computeroutput">safe_link</code>).</p>
