Compare<span class="special">&gt;</span> 
  <span class="keyword">static</span> <span class="identifier">node_ptr</span> 
  <a name="idp57056352-bb"></a><span class="identifier">insert_equal</span><span class="special">(</span><span class="identifier">node_ptr</span> header<span class="special">,</span> <span class="identifier">node_ptr</span> hint<span class="special">,</span> <span class="identifier">node_ptr</span> new_node<span class="special">,</span> 
               <span class="identifier">NodePtrCom