d">class</span> <span class="identifier">NextPolicies</span> <span class="special">=</span> <span class="identifier">unspecified</span><span class="special">&gt;</span>
    <span class="keyword">struct</span> <span class="identifier">iterator</span> <span class="special">:</span> <span class="identifier">object</span>
    <span class="special">{</span>
      <span class="identifier">iterator</span><span class="special">();</span>
    <span class="special">};</span>
  <span class="special">}}</span>
</pre>
<