keyword">class</span> <span class="identifier">T</span><span class="special">,</span> <span class="keyword">class</span> <span class="identifier">U</span><span class="special">&gt;</span>  <span class="keyword">struct</span> <a class="link" href="conditional.html" title="conditional">conditional</a><span class="special">;</span>
<span class="special">}</span>
</pre>
<p>
        If B is true, the member typedef type shall equal T. If B is false, the member
        typedef type shall equal U.
      </p>
<p>
 