an><span class="keyword">typename</span> FwdIter<span class="special">&gt;</span> 
  <span class="identifier">char_class_type</span> 
  <a name="id-1_3_47_5_18_2_1_1_3_11-bb"></a><span class="identifier">lookup_classname</span><span class="special">(</span><span class="identifier">FwdIter</span> begin<span class="special">,</span> <span class="identifier">FwdIter</span> end<span class="special">,</span> <span class="keyword">bool</span> icase<span class="special">)</span> <span class="keyword">const</span><