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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct myArray;
  5.  
  6. class proxy {
  7. 	myArray &array;
  8. 	int index;
  9. public:
  10.     proxy(myArray &_array, int _index)
  11.     :   array(_array)
  12.     ,   index(_index) {
  13.     }
  14.     proxy& operator=(int value);
  15.     operator int() const;
  16. };
  17. struct myArray {
  18. 	int data[100];
  19. 	proxy operator[](int index) {
  20. 		return proxy(*this, index);
  21. 	}
  22. };
  23.  
  24. proxy& proxy::operator=(int value) {
  25. 	cout << "Asigning " << value << " to element " << index << endl;
  26. 	array.data[index] = value;
  27. 	return *this;
  28. }
  29.  
  30. proxy::operator int() const {
  31. 	cout << "Reading element at " << index << endl;
  32. 	array.data[index];
  33. }
  34.  
  35. int main() {
  36. 	myArray a;
  37. 	a[5] = 123;
  38. 	a[8] = 321;
  39. 	int x = a[5];
  40. 	return 0;
  41. }
Success #stdin #stdout 0s 3296KB
comments (?)
stdin 
Standard input is empty
stdout 
Asigning 123 to element 5
Asigning 321 to element 8
Reading element at 5
https://ideone.com/nsAKEO
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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