        </p>
                  </td>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">Num</span></code>, attribute
                      is mandatory (otherwise compilation will fail)
                    </p>
                  </td>
</tr>
<tr>
<td>
                    <p>
</p>
<pre xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" class="table-programlisting"><span class="identifier">real_generator</span><span class="special">&lt;</spa