bb"><span class="identifier">widen</span></a><span class="special">(</span><span class="keyword">char</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="special">&gt;</span> <span class="keyword">unsigned</span> <span class="keyword">char</span> <a class="link" href="c_regex_traits.html#idp115389584-bb"><span class="identifier">hash</span></a><span class="special">(</span><span class="keyword">char</span><sp