code>
                    </p>
                  </td>
<td>
                    <p>
                      <code class="computeroutput"><span class="identifier">mpl</span><span class="special">::</span><span class="identifier">true_</span></code>
                    </p>
                  </td>
</tr>
</tbody>
</table></div>
<h6>
<a name="spirit.advanced.customize.string_traits.is_char.h7"></a>
            <span class="phrase"><a name="spirit.advanced.customize.string_traits.is_char.when_to_implement"></a></s