mment>    </span><span class=keyword>typedef
        </span><span class=identifier>alternative</span><span class=special>&lt;
            </span><span class=identifier>chlit</span><span class=special>&lt;&gt;</span><span class=comment>      //  i
          </span><span class=special>,</span> <span class=identifier>sequence</span><span class=special>&lt;
                </span><span class=identifier>chlit</span><span class=special>&lt;&gt;  </span><span class=comment>//  j
          </span><span class=specia