span class="identifier">pbase1_type</span><span class="special">::</span><span class="identifier">member</span> <span class="special">)</span>
  <span class="special">,</span> <span class="identifier">base2_type</span><span class="special">(</span> <span class="identifier">pbase2_type</span><span class="special">::</span><span class="identifier">member</span> <span class="special">)</span>
<span class="special">{</span>
    <span class="comment">//...</span>
<span class="special">}</span>
</pre>
<p>
      T