">typename</span> FwdIter<span class="special">&gt;</span> 
  <span class="keyword">static</span> <span class="identifier">string_type</span> <a name="idp115414480-bb"></a><span class="identifier">transform_primary</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="special">;</span></pre>
<p>Returns a sort key for the character sequence designated by the iterator