ode.</p>
</dd>
<dt class="hdlist1"><code>struct tree_desc</code></dt>
<dd>
<p>A semi-opaque data structure used to maintain the current state of the
walk.</p>
<div class="ulist">
<ul>
<li>
<p><code>buffer</code> is a pointer into the memory representation of the tree. It always
points at the current entry being visited.</p>
</li>
<li>
<p><code>size</code> counts the number of bytes left in the <code>buffer</code>.</p>
</li>
<li>
<p><code>entry</code> points to the current entry being visited.</p>
</li>
</ul