an class="identifier">NodePtrCompare</span><span class="special">,</span> <span class="identifier">node_ptr</span><span class="special">,</span> <span class="identifier">node_ptr</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> NodePtrCompare<span class="special">&gt;</span> 
    <span class="keyword">static</span> <span class="keyword">void</span> <a class="link" href="avltree_alg