">(</span><span class="identifier">rng2</span><span class="special">))</span></code>
                is a valid range.
              </li>
</ul></div>
<h6>
<a name="range.reference.algorithms.mutating.merge.h7"></a>
            <span class="phrase"><a name="range.reference.algorithms.mutating.merge.complexity"></a></span><a class="link" href="merge.html#range.reference.algorithms.mutating.merge.complexity">Complexity</a>
          </h6>
<p>
            Linear. There are no comparisons if both <code class="c