="./back-extensible-sequence.html">Back Extensible Sequence</a></td>
<td>A sequence to erase the last element from.</td>
</tr>
</tbody>
</table>
</div>
<div class="section" id="id323">
<h3><a class="subsection-title" href="#expression-semantics" name="expression-semantics">Expression semantics</a></h3>
<p>For any <a class="reference internal" href="./back-extensible-sequence.html">Back Extensible Sequence</a> <tt class="literal"><span class="pre">s</span></tt>:</p>
<pre class="literal-block">
typedef <a hre