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  1. #include <iostream>
  2.  
  3. union __union final {
  4. const int i;
  5. };
  6.  
  7. int main ()
  8. {
  9. using foo = const union ::__union;
  10. foo un = { .i = 0 };
  11.  
  12. std::cout << un.i << std::endl;
  13.  
  14. return 0;
  15. }
Success #stdin #stdout 0s 2896KB
stdin
Standard input is empty
stdout
0