#ifdef Type_Is_
#if !Result
#error Result should be 1 in WARN mode
#endif
#endif

#ifdef Type_Is_NEW
#if Result
#error Result should be 0 in NEW mode
#endif
#endif

#ifdef Type_Is_OLD
#if !Result
#error Result should be 1 in OLD mode
#endif
#endif

#if !defined(Type_Is_) && !defined(Type_Is_OLD) && !defined(Type_Is_NEW)
#error No expected definition present
#endif

void foo(void)
{
}