lass="special">&lt;</span><span class="identifier">Args</span><span class="special">&gt;()...);</span>
</pre>
<p>
        valid?
      </p>
<p>
        There are a number of important special cases for this trait:
      </p>
<pre class="programlisting"><span class="identifier">is_constructible</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">value</span>
</pre>
<p>
        Indicates whether <code class="computeroutput"><span 