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  1. #include <iostream>
  2. #include <utility>
  3. struct A;
  4. struct B
  5. {
  6.     A& ref;
  7.     int n;
  8.     void show() const;
  9. };
  10.  
  11. struct A
  12. {
  13.     B& ref;
  14.     int n;
  15.     void show() const;
  16. };
  17.  
  18. void A::show() const
  19. {
  20.     std::cout << "A.n is " << n
  21.               << " A.ref.n is " << ref.n
  22.               << " A.ref.ref.n is " << ref.ref.n
  23.               << " A.ref.ref.ref.n is " << ref.ref.ref.n
  24.               << '\n';
  25. }
  26.  
  27. void B::show() const
  28. {
  29.     std::cout << "B.n is " << n
  30.               << " B.ref.n is " << ref.n
  31.               << " B.ref.ref.n is " << ref.ref.n
  32.               << " B.ref.ref.ref.n is " << ref.ref.ref.n
  33.               << '\n';
  34. }
  35.  
  36. int main()
  37. {
  38.     struct {A first; B second;} pair = {{pair.second, 2}, {pair.first, 1}};
  39.     pair.first.show();
  40.     pair.second.show();
  41. }
  42.  
Success #stdin #stdout 0.02s 2724KB
comments (?)
stdin
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Standard input is empty
stdout
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A.n is 2 A.ref.n is 1 A.ref.ref.n is 2 A.ref.ref.ref.n is 1
B.n is 1 B.ref.n is 2 B.ref.ref.n is 1 B.ref.ref.ref.n is 2
https://ideone.com/P4XFw
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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