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boost_preprocessor/include/boost/preprocessor/expand.hpp

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#ifndef BOOST_PREPROCESSOR_EXPAND_HPP
#define BOOST_PREPROCESSOR_EXPAND_HPP
/* Copyright (C) 2001
* Housemarque Oy
* http://www.housemarque.com
*
* Permission to copy, use, modify, sell and distribute this software is
* granted provided this copyright notice appears in all copies. This
* software is provided "as is" without express or implied warranty, and
* with no claim as to its suitability for any purpose.
*
* See http://www.boost.org for most recent version.
*/
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#include <boost/preprocessor/identity.hpp>
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/** <p>Essentially macro expands the parameter <code>X</code> twice.</p> */
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#define BOOST_PP_EXPAND(X) X
#endif