</p></td>
<td><p>true iff the sets of types that the placeholders bind to are the same for both arguments.</p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Nothing. </td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">friend</span> <span class="keyword">bool</span> <a name="id-1_3_41_13_3_1_1_1_3_2-bb"></a><span class="keyword">operator</span><span class="special">!=</span><span class="special">(</span><span class="keyword"