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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. struct smth
  6. {
  7. 	template <int i> struct key_t {};
  8.  
  9. 	int x; int get(key_t<1>) { return this->x; }
  10. 	double y; double get(key_t<2>) { return this->y; }
  11.  
  12. 	template <int i> auto get() -> decltype (this->get(key_t<i>())) { return this->get(key_t<i>()); }
  13. };
  14.  
  15. int main()
  16. {
  17. 	smth s = {1, 2.5};
  18.  
  19. 	cout << s.x << ' ' << s.y << endl;
  20. 	cout << s.get<1>() << ' ' << s.get<2>() << endl;
  21.  
  22. 	return 0;
  23. }
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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1 2.5
1 2.5
https://ideone.com/ac32bj
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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