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<pre class="literallayout"><span class="keyword">static</span> <span class="keyword">void</span> <a name="idp72465440-bb"></a><span class="identifier">swap_nodes</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">node_ptr</span> <span class="special">&amp;</span> node1<span class="special">,</span> <span class="keyword">const</span> <span class="identifier">node_ptr</span> <span class="special">&amp;</span> header1<span class="special">,</span> 
              