mplate</span> <span class="special">&lt;&gt;</span>
<span class="keyword">struct</span> <a class="link" href="reference/is_void.html" title="is_void">is_void</a><span class="special">&lt;</span><span class="keyword">void</span><span class="special">&gt;</span> <span class="special">:</span> <span class="keyword">public</span> <a class="link" href="reference/integral_constant.html" title="integral_constant">true_type</a><span class="special">{};</span>
</pre>
<p>
      Here we define a primary version of the