le to <code>T</code>. See the <a href=
        "#symmetry">Symmetry Note</a>.</td>
      </tr>

      <tr>
        <td><code><a name="andable2">andable&lt;T, U&gt;</a></code><br>
         <code>andable2&lt;T, U&gt;</code></td>

        <td><code>T operator&amp;(const T&amp;, const U&amp;)</code><br>
         <code>T operator&amp;(const U&amp;, const T&amp;)</code></td>

        <td><code>T temp(t); temp &amp;= u</code>.<br>
         Return convertible to <code>T</code>. See the <a href=
        "#symmetry">