n class="special">(</span><span class="identifier">dataset1_iter</span><span class="special">,</span> <span class="identifier">DataSet2</span> <span class="keyword">const</span> <span class="special">&amp;</span><span class="special">)</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="iterator.html#idp58373280-bb">public member functions</a></span>
  <span class="keyword">auto</span> <a class="link" href="iterator.html#idp58373840-bb"><span class="keyword">operator</span