dentifier">node_ptr</span> <span class="special">&amp;</span> pos<span class="special">,</span> 
              <span class="keyword">const</span> <span class="identifier">node_ptr</span> <span class="special">&amp;</span> new_node<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. "pos" must be a valid iterator or header (end) node. "pos" must be an iterator pointing to the successor to "new_no