s="identifier">boost</span><span class="special">::</span><span class="identifier">iterator_adaptor</span><span class="special">&lt;</span>
        <span class="identifier">node_iter</span><span class="special">&lt;</span><span class="identifier">Value</span><span class="special">&gt;</span>                <span class="comment">// Derived</span>
      <span class="special">,</span> <span class="identifier">Value</span><span class="special">*</span>                          <span class="comment">// Base</spa