n class="emphasis"><em>Spirit.Classic</em></span></a>.
        Since the directory structure has changed (the Spirit Classic headers are
        now moved to the $BOOST_ROOT/boost/spirit/home/classic directory), we created forwarding headers allowing existing
        applications to compile without any change. However, these forwarding headers
        are deprecated, which will result in corresponding warnings generated for
        each of the headers starting with Boost V1.38. The forwarding headers are
  