n<span class="special">,</span> <span class="identifier">InputIter</span> end<span class="special">,</span> 
          <span class="identifier">flag_type</span> flags <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></pre>
<p>Factory method for building a regex object from a range of characters. Equivalent to <code class="computeroutput"><a class="