derlying sequence.
        These overloads allow a normal narrow character C string literal to be used
        as an argument, even when the underlying character type of the expression
        being matched may be something more exotic such as a Unicode character type.
      </p>
<a name="boost_regex.match_results.position"></a><pre class="programlisting"><span class="identifier">difference_type</span> <span class="identifier">position</span><span class="special">(</span><span class="keyword">unsigned</span