_v2_0__boost_v1_37_0__to_v2_1__boost_v1_41_0_">What's
        changed in <span class="emphasis"><em>Spirit.Lex</em></span> from V2.0 (Boost V1.37.0) to V2.1
        (Boost V1.41.0)</a>
      </h5>
<p>
        Here is a list of changes in <span class="emphasis"><em>Spirit.Lex</em></span> since version
        2.0. <span class="emphasis"><em>Spirit.Lex</em></span> 2.1 is a complete rewrite of the <span class="emphasis"><em>Spirit.Lex</em></span>
        distributed with Boost V1.37. As with all code portions 