s="keyword">typedef</span> <span class="identifier">BidiIter</span>                            <a name="boost.xpressive.basic_regex.iterator_type"></a><span class="identifier">iterator_type</span><span class="special">;</span>
  <span class="keyword">typedef</span> <span class="identifier">iterator_value</span><span class="special">&lt;</span> <span class="identifier">BidiIter</span> <span class="special">&gt;</span><span class="special">::</span><span class="identifier">type</span>    <a name="boost.xpress