>&lt;</span><span class="keyword">typename</span> T<span class="special">,</span> <span class="keyword">class</span><span class="special">...</span> Options<span class="special">&gt;</span> 
<span class="keyword">struct</span> <a class="link" href="make_avltree.html" title="Struct template make_avltree">make_avltree</a> <span class="special">{</span>
  <span class="comment">// types</span>
  <span class="keyword">typedef</span> <span class="identifier">implementation_defined</span> <a name="boost.intrusive.