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  1. #include <stdio.h>
  2.  
  3. #define LIST_OF_ENUM_IDS \
  4.     X(A, 0) \
  5.     X(B, 1) \
  6.     X(C, 2) \
  7.     X(D, 4) \
  8.     X(E, 6) \
  9.     X(F, 8) \
  10.     X(G, 10)
  11.  
  12. #define X(id, val) \
  13.   id = val,
  14.  
  15. typedef enum
  16. {
  17.   LIST_OF_ENUM_IDS
  18. } my_enum;
  19.  
  20. #undef X
  21.  
  22. #define X(id, val) id##_impl_helper,
  23.  
  24. enum my_enum_impl_helper__ {
  25.   LIST_OF_ENUM_IDS
  26.   MY_ENUM_MAX_ELEMENTS
  27. };
  28.  
  29. #undef X
  30.  
  31. int main(void) {
  32. 	printf("%d %d %d", A, G, MY_ENUM_MAX_ELEMENTS);
  33. 	return 0;
  34. }
  35.  
Success #stdin #stdout 0s 10320KB
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0 10 7
https://ideone.com/8iFjCe
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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