Inherits:</strong></span> If T is an empty class type (and
        not a union type) then inherits from <a class="link" href="integral_constant.html" title="integral_constant">true_type</a>,
        otherwise inherits from <a class="link" href="integral_constant.html" title="integral_constant">false_type</a>.
      </p>
<p>
        <span class="bold"><strong>C++ Standard Reference:</strong></span> 10p5.
      </p>
<p>
        <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <