lass="identifier">x1</span><span class="special">...</span> <span class="identifier">TN</span> <span class="keyword">const</span><span class="special">&amp;</span> <span class="identifier">xN</span><span class="special">);</span>
</pre>
<p>
            For C++11 compilers, the variadic function interface has no upper bound.
          </p>
<p>
            For C++03 compilers, the variadic function accepts <code class="computeroutput"><span class="number">0</span></code>
            to <code class="computerou