is empty, an error is given.</p></li>
</ul><ul><li><p><code>rev(x)</code> and <code>ref_rev(x)</code> reverses all elements being done on a copy or in
place, respectively.</p></li>
</ul><ul><li><p><code>rotate(x, n)</code> rotate all elements <code>n</code> steps to the right, If <code>n</code> is
negative, rotate to the left.</p></li>
</ul></div>
    <div class="section level2">
    <h2 id="see-also">See also<a class="anchor" aria-label="anchor" href="#see-also"></a></h2>
    <div class="dont-index"><p>See