equence_type</span> <span class="identifier">capture_sequence_type</span><span class="special">;</span>
</pre>
<p>
        Defines an implementation-specific type that satisfies the requirements of
        a standard library Sequence (21.1.1 including the optional Table 68 operations),
        whose value_type is a <code class="computeroutput"><span class="identifier">sub_match</span><span class="special">&lt;</span><span class="identifier">BidirectionalIterator</span><span class="special">&gt;</span></code