pan><span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">pool</span>
<span class="special">{</span>
  <span class="keyword">private</span><span class="special">:</span>
    <span class="identifier">pool</span><span class="special">(</span><span class="keyword">const</span> <span class="identifier">pool</span> <span class="special">&amp;);</span>
    <span class="keyword">void</span> <span class="keyword">operator</span><span class="special">=(</span><span class="keyw