>std</span><span class="special">::</span><span class="identifier">bad_cast</span></code> or derived.
      </p>
      <p>
        It must have the following interface (it does not has to be a template class):
      </p>
<pre class="programlisting"><span class="keyword">struct</span> <span class="identifier">YourOverflowHandlerPolicy</span>
<span class="special">{</span>
    <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">()</span> <span class="special">(</span> 