tor&lt;(const U&amp;, const T&amp;)</code><br>
         <code>bool operator&lt;=(const U&amp;, const T&amp;)</code><br>
         <code>bool operator&gt;=(const U&amp;, const T&amp;)</code></td>

        <td><code>t &lt; u</code>. <code>t &gt; u</code>.<br>
         Returns convertible to <code>bool</code>. See the <a href=
        "#ordering">Ordering Note</a>.</td>
      </tr>

      <tr>
        <td><code><a name=
        "equality_comparable1">equality_comparable&lt;T&gt;</a></code><br>
         <code>eq