r</span> header2<span class="special">,</span> <span class="identifier">node_ptr</span> z<span class="special">)</span><span class="special">;</span></pre>
<p><span class="bold"><strong>Requires</strong></span>: header1 and header2 must be the headers of trees tree1 and tree2 respectively, z a non-header node of tree1. NodePtrCompare is the comparison function of tree1..</p>
<p><span class="bold"><strong>Effects</strong></span>: Transfers node "z" from tree1 to tree2 if tree1 does not contain a node that is