ifier">BidirectionalIterator</span><span class="special">&gt;</span> <span class="special">&gt;</span>
<span class="keyword">class</span> <span class="identifier">match_results</span>
<span class="special">{</span>
<span class="keyword">public</span><span class="special">:</span>
   <span class="keyword">typedef</span>          <span class="identifier">sub_match</span><span class="special">&lt;</span><span class="identifier">BidirectionalIterator</span><span class="special">&gt;</span>                      