"keyword">const</span> <span class="special">&amp;</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>

  <span class="comment">// <a class="link" href="regex_compiler.html#id-1_3_47_5_18_2_1_13_6-bb">private member functions</a></span>
  <span class="keyword">bool</span> <a class="link" href="regex_compiler.html#id-1_3_47_5_18_2_1_13_6_1-bb"><span class="identifier">is_upper_</span></a><span class="special">(</span><span class="identifier">char_type</span><