sub_match.html" title="sub_match"><code class="computeroutput"><span class="identifier">sub_match</span></code></a>
        object whose matched member is false.
      </p>
<p>
        The template overloads of this function, allow the string and/or character
        type to be different from the character type of the underlying sequence and/or
        regular expression: in this case the characters will be widened to the underlying
        character type of the original regular expression. A compiler error