ass="special">,</span> <span class="keyword">typename</span> <span class="identifier">UserAllocator</span> <span class="special">=</span> <span class="identifier">default_user_allocator_new_delete</span><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">object_pool</span>
<span class="special">{</span>
  <span class="keyword">private</span><span class="special">:</span>
    <span class="identifier">object_pool</span><span class="special">(</span><span class="keywor