</span> UserAllocator <span class="special">=</span> <a class="link" href="default_user_allocator_new_delete.html" title="Struct default_user_allocator_new_delete">default_user_allocator_new_delete</a><span class="special">&gt;</span> 
<span class="keyword">class</span> <a class="link" href="pool.html" title="Class template pool">pool</a> <span class="special">:</span>
  <span class="keyword">protected</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">simple