N<sup>2</sup>), or if the program runs out of stack space while matching
        the expression (if Boost.Regex is configured in recursive mode), or if the
        matcher exhausts its permitted memory allocation (if Boost.Regex is configured
        in non-recursive mode).
      </p>
<p>
        <span class="bold"><strong>Returns</strong></span>: <code class="computeroutput"><span class="special">*</span><span class="keyword">this</span></code>.
      </p>
<a name="boost_regex.regex_token_iterator.op_inc2"