l. If not specified, elements are output without separation. </p></td>
</tr>
<tr>
<td><p><span class="term"><code class="computeroutput">tuple</code></span></p></td>
<td><p>Heterogeneous sequence of elements to output. The sequence must be supported by Boost.Fusion, and its elements must support stream output. </p></td>
</tr>
</tbody>
</table></div></td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>Manipulator to be inserted into the stream.</p></td>
</tr>
</tbody>
</table></div>
</d