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

        <td><code>t == u</code>.<br>
         Return convertible to <code>bool</code>.</td>
      </tr>

      <tr>
        <td><code><a name="addable1">addable&lt;T&gt;</a></code><br>
         <code>addable1&lt;T&gt;</code></td>

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

        <td><code>T temp(t); temp += t1</code>.<br>
         Return convertible to <code>T</code>. See the <a