s as</th>
</tr>
<tr>
  <td><code>int f()const volatile</code></td>
  <td><a href="../reference/key_extraction.html#cv_mem_fun"><code>cv_mem_fun</code></a><code>&lt;int,X,&amp;X::f&gt;</code></td>
  <td align="center" rowspan="3">&nbsp;<code>const_mem_fun</code>&nbsp;</td>
</tr>
<tr>
  <td><code>int f()const&amp;</code></td>
  <td><a href="../reference/key_extraction.html#cv_mem_fun"><code>cref_mem_fun</code></a><code>&lt;int,X,&amp;X::f&gt;</code></td>
</tr>
<tr>
  <td><code>int f()const volatile&amp;</code