pan class="special">,</span> 
              <span class="identifier">KeyNodePtrCompare</span> comp<span class="special">)</span><span class="special">;</span></pre>
<p><span class="bold"><strong>Requires</strong></span>: "header" must be the header node of a tree. KeyNodePtrCompare is a function object that induces a strict weak ordering compatible with the strict weak ordering used to create the the tree. KeyNodePtrCompare can compare KeyType with tree's node_ptrs.</p>
<p><span class="bold"><strong>Effects