of the <a href="http://boost-spirit.com" target="_top">Spirit</a>
        library, <span class="emphasis"><em>Spirit.Lex</em></span> is usable as stand alone piece.
        <span class="emphasis"><em>Spirit.Lex</em></span> now uses the infrastructure provided by
        <a href="http://boost-spirit.com" target="_top">Spirit</a> version 2.1.
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            The lex::lexer_def class has been rename