) ()
const</code></td>
<td>Returns a <code>const</code> reference of the container.</td>
</tr>
<tr>
<td><code>container_type &amp;operator () ()</code></td>
<td>Returns a reference of the container.</td>
</tr>
</tbody>
</table>

<h2><a name="vector_references"></a>Vector References</h2>
<h3>Reference</h3>
<h4>Description</h4>
<p>The templated class <code>vector_reference&lt;E&gt;</code>
contains a reference to a vector expression.</p>
<h4>Definition</h4>
<p>Defined in the header vector_expression.hpp.</p>
<