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  1. #include <stdio.h>
  2.  
  3. #define DEFLABEL(name) void *name;
  4.  
  5. #define LABELED(retType, fName, labelDefs) labelDefs;\
  6. retType fName
  7.  
  8. #define MKLABEL(name, labelName) name = &&labelName;
  9.  
  10. LABELED(void, test, 
  11. 	DEFLABEL(test_l1) 
  12. 	DEFLABEL(test_l2) 
  13. 	DEFLABEL(test_l3)) (void *ptr) {
  14.  
  15. 	MKLABEL(test_l1, l1);
  16. 	MKLABEL(test_l2, l2);
  17. 	MKLABEL(test_l3, l3);
  18.  
  19. 	if (ptr)
  20.     	goto *ptr;
  21.     return;
  22. l1:
  23.     printf("test1\n");
  24.     return;
  25. l2:
  26.     printf("test2\n");
  27.     return;
  28. l3:
  29.     printf("test3\n");
  30.     return;
  31. }
  32.  
  33. int main(void) {
  34. 	test(0);
  35. 	test(test_l1);
  36. 	test(test_l2);
  37. 	test(test_l3);
  38. }
  39.  
Success #stdin #stdout 0s 9432KB
comments (?)
stdin 
Standard input is empty
stdout 
test1
test2
test3
https://ideone.com/PVdHeg
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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