e</span> <span class="special">=</span> <span class="identifier">regex_constants</span><span class="special">::</span><span class="identifier">ECMAScript</span><span class="special">)</span><span class="special">;</span>
  <span class="keyword">template</span><span class="special">&lt;</span><span class="keyword">typename</span> InputRange<span class="special">&gt;</span> 
    <span class="identifier">disable_if</span><span class="special">&lt;</span> <span class="identifier">is_pointer</span><span class="s