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| <div class="titlepage"><div><div><h3 class="title"> |
| <a name="spirit.what_s_new.spirit_1_x"></a><a class="link" href="spirit_1_x.html" title="Spirit Classic">Spirit Classic</a> |
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| <p> |
| The Spirit V1.8.x code base has been integrated with Spirit V2. It is now |
| called <a href="../../../../../../libs/spirit/classic/index.html" target="_top"><span 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 |
| expected to be removed in the future. |
| </p> |
| <p> |
| The recommended way of using Spirit Classic now is to include header files |
| from the directory $BOOST_ROOT/boost/spirit/include. All Spirit Classic headers in this directory have 'classic_' |
| prefixed to their name. For example the include |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">core</span><span class="special">/</span><span class="identifier">core</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <p> |
| now should be written as: |
| </p> |
| <pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">spirit</span><span class="special">/</span><span class="identifier">include</span><span class="special">/</span><span class="identifier">classic_core</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> |
| </pre> |
| <p> |
| To avoid namespace conflicts with the new Spirit V2 library we moved Spirit |
| Classic into the namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span><span class="special">::</span><span class="identifier">classic</span></code>. |
| All references to the former namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span></code> |
| need to be adjusted as soon as the header names are corrected as described |
| above. As an alternative you can define the preprocessor constant <code class="computeroutput"><span class="identifier">BOOST_SPIRIT_USE_OLD_NAMESPACE</span></code>, which will |
| force the Spirit Classic code to be in the namespace <code class="computeroutput"><span class="identifier">boost</span><span class="special">::</span><span class="identifier">spirit</span></code> |
| as before. This is not recommended, though, as it may result in naming clashes. |
| </p> |
| <p> |
| The change of the namespace will be automatically deactivated whenever the |
| deprecated include files are being used. This ensures full backwards compatibility |
| for existing applications. |
| </p> |
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| <td align="right"><div class="copyright-footer">Copyright © 2001-2010 Joel de Guzman, Hartmut Kaiser<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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