<span class="identifier">false_</span></code>
                      otherwise (See <a href="../../../../../../../../libs/mpl/doc/refmanual/integral-constant.html" target="_top">MPL
                      Boolean Constant</a>).
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="spirit.karma.reference.generator_concepts.narygenerator.h4"></a>
            <span class="phrase"><a name="spirit.karma.reference.generator_concepts.narygenerator.invariants"></a></span><a clas