#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/debug/assert.hpp>
#include <boost/preprocessor/detail/is_nullary.hpp>
#include <boost/preprocessor/logical/bitnor.hpp>
#include <boost/preprocessor/logical/compl.hpp>
#define IS_EDISON_DESIGN_GROUP() /* ..... */ \
BOOST_PP_COMPL( \
BOOST_PP_IS_NULLARY( \
BOOST_PP_CAT(IS_EDG_CHECK, __EDG__) \
) \
) \
/**/
#define IS_EDG_CHECK__EDG__ ()
#define IS_METROWERKS() /* .................... */ \
BOOST_PP_COMPL( \
BOOST_PP_IS_NULLARY( \
BOOST_PP_CAT(IS_MWERKS_CHECK, __MWERKS__) \
) \
) \
/**/
#define IS_MWERKS_CHECK__MWERKS__ ()
#define IS_MICROSOFT() /* ... */ \
BOOST_PP_BITNOR( \
IS_MICROSOFT_ROOT(), \
IS_EDISON_DESIGN_GROUP() \
) \
/**/
#define IS_MICROSOFT_ROOT() /* ......... */ \
BOOST_PP_IS_NULLARY( \
BOOST_PP_CAT(IS_MSVC_CHECK, _MSC_VER) \
) \
/**/
#define IS_MSVC_CHECK_MS_VER ()
// this macro doesn't work on EDG...
// (this is just an example)
#define MACRO(n) /* ....... */ \
BOOST_PP_CAT( \
MACRO_, \
IS_EDISON_DESIGN_GROUP() \
)(n) \
/**/
#define MACRO_1(n) /* ................ */ \
BOOST_PP_ASSERT(0) \
"Edison Design Group is not supported" \
/**/
#define MACRO_0(n) normal mode: n
MACRO(10)