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boost_preprocessor/include/boost/preprocessor/if.hpp

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#ifndef BOOST_PREPROCESSOR_IF_HPP
#define BOOST_PREPROCESSOR_IF_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.
*/
#include <boost/preprocessor/logical/bool.hpp>
#include <boost/preprocessor/tuple/elem.hpp>
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/** <p>Expands to <code>T</code> if <code>C != 0</code> and <code>E</code> if
<code>C == 0</code>.</p>
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<p>BOOST_PP_IF() enables convenient generation of lists using
BOOST_PP_REPEAT().</p>
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*/
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#define BOOST_PP_IF(C,T,E) BOOST_PP_IF_BOOL(BOOST_PP_BOOL(C))(E,T)
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#ifndef DOXYGEN_SHOULD_SKIP_THIS
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#define BOOST_PP_IF_BOOL(C) BOOST_PP_IF_BOOL_DELAY(C)
#define BOOST_PP_IF_BOOL_DELAY(C) BOOST_PP_TUPLE2_ELEM##C
#endif
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/** <p>Obsolete. Use BOOST_PP_IF().</p> */
#define BOOST_PREPROCESSOR_IF(C,T,E) BOOST_PP_IF(C,T,E)
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#endif