has been moved into the namespace boost::spirit::classic.
          A special compatibility layer has been added to ensure complete compatibility
          with existing code using Spirit V1.8.
        </li>
<li class="listitem">
          <span class="emphasis"><em>Spirit.Qi</em></span>: This is the parser library allowing you
          to build recursive descent parsers. The exposed domain-specific language
          can be used to describe the grammars to implement, and the rules for storing
          th