code>
                </p>
</td>
</tr>
<tr>
<td><p><span class="term">Returns:</span></p></td>
<td><p>
                  <code class="computeroutput"><a class="link" href="../value.html" title="Function value">proto::value</a>(expr)</code>
                </p></td>
</tr>
<tr>
<td><p><span class="term">Throws:</span></p></td>
<td>Will not throw.</td>
</tr>
</tbody>
</table></div>
</li>
<li class="listitem">
<pre class="literallayout"><span class="keyword">template</span><span class="special">&lt;</span><span