                     <code class="computeroutput"><span class="identifier">a</span></code> fails, throw
                      an <code class="computeroutput"><span class="identifier">expectation_failure</span><span class="special">&lt;</span><span class="identifier">Iter</span><span class="special">&gt;</span></code>
                    </p>
                  </td>
</tr></tbody>
</table></div>
<h6>
<a name="spirit.qi.reference.directive.expect.h5"></a>
            <span class="phrase"><a name="spirit.qi.ref