al">,</span> <span class="identifier">T</span> <span class="special">&amp;&amp;</span> args<span class="special">,</span> 
                                <span class="identifier">index_sequence</span><span class="special">&lt;</span> <span class="identifier">I</span><span class="special">...</span><span class="special">&gt;</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>
      <span class="keyword">template</span><span