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  1. #include <iostream>
  2. #include <memory>
  3. #include <functional>
  4.  
  5. using namespace std;
  6.  
  7. class A {
  8. public:
  9. 	std::function<int()> operator[] (int i) {
  10. 		return [i](){
  11. 			return i;
  12. 		};
  13. 	}
  14. };
  15.  
  16. int main() {
  17. 	A a;
  18. 	cout << a[5]() << endl; // <- 5
  19. 	cout << a[6]() << endl; // <- 6
  20.  
  21. 	return 0;
  22. }
  23.  
Success #stdin #stdout 0s 3412KB
comments (?)
stdin 
Standard input is empty
stdout 
5
6
https://ideone.com/j9K89D
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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