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  1. #include <stdio.h>
  2.  
  3. #define ASIZE(a) (sizeof (a) / sizeof((a)[0]))
  4. #define GET_COMPATIBLE_ARRAY_PTR_TYPE( a ) __typeof__((a)[0])(*)[ASIZE(a)]
  5. #define GET_CHECKING_FUNC_PTR_TYPE( a ) int (*)(GET_COMPATIBLE_ARRAY_PTR_TYPE( a ))
  6. #define CHECK_ARRAY(a) ((void)(0&&((GET_CHECKING_FUNC_PTR_TYPE( a ))NULL)(&(a))))
  7.  
  8. int main(void)
  9. {
  10. 	short a[3];
  11. 	short *b;
  12. 	int c[2];
  13. 	int *d;
  14. 	long long e[5][4];
  15. 	char *f[4];
  16. 	char (*g)[4];
  17. 	(void)a; (void)b; (void)c; (void)d; (void)e; (void)f; (void)g;
  18. 	printf("CHECK_ARRAY() only 'accepts' arrays (try uncommenting).\n");
  19. 	CHECK_ARRAY( a );
  20. 	//CHECK_ARRAY( b );
  21. 	CHECK_ARRAY( c );
  22. 	//CHECK_ARRAY( d );
  23. 	CHECK_ARRAY( e );
  24. 	//CHECK_ARRAY( f );
  25. 	//CHECK_ARRAY( g );
  26. 	return 0;
  27. }
  28.  
Success #stdin #stdout 0s 2156KB
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CHECK_ARRAY() only 'accepts' arrays (try uncommenting).
https://ideone.com/MtRHkv
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
public

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