typecheck.h 585 B

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  1. #ifndef TYPECHECK_H_INCLUDED
  2. #define TYPECHECK_H_INCLUDED
  3. /*
  4. * Check at compile time that something is of a particular type.
  5. * Always evaluates to 1 so you may use it easily in comparisons.
  6. */
  7. #define typecheck(type,x) \
  8. ({ type __dummy; \
  9. typeof(x) __dummy2; \
  10. (void)(&__dummy == &__dummy2); \
  11. 1; \
  12. })
  13. /*
  14. * Check at compile time that 'function' is a certain type, or is a pointer
  15. * to that type (needs to use typedef for the function type.)
  16. */
  17. #define typecheck_fn(type,function) \
  18. ({ typeof(type) __tmp = function; \
  19. (void)__tmp; \
  20. })
  21. #endif /* TYPECHECK_H_INCLUDED */