k" href="../operator/sequence.html" title="Sequence Parser (a &gt;&gt; b)">Sequence</a>
            simply returns a no-match (returns <code class="computeroutput"><span class="keyword">false</span></code>)
            when one of the elements fail, the expect directive throws an <a class="link" href="../operator/expect.html#spirit.qi.reference.operator.expect.expectation_failure"><code class="computeroutput"><span class="identifier">expectation_failure</span></code></a><code class="computeroutput"><span cl