s RegEx is now deprecated and does not form
          part of the regular expression standardization proposal. This type still
          exists, and existing code will continue to compile, however the following
          documentation is unlikely to be further updated.
        </p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">cregex</span><span class="special