ut">rhs</code>, or empty if
            <code class="computeroutput">rhs.<a class="link" href="any.html#id-1_3_5_5_2_1_2_13_1-bb">empty</a>()</code>.</td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>
<code class="computeroutput">std::bad_alloc</code>
            or any exceptions arising from the copy constructor of the
            contained type. Assignment satisfies the strong guarantee
            of exception safety.</td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pr