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  1. template<typename Friend, typename FieldType>
  2. class crazyconst
  3. {
  4.     struct identity { typedef Friend type; };
  5.     FieldType value;
  6.     friend class identity::type;
  7.     FieldType& operator=(const FieldType& newValue) { return value = newValue; }
  8. public:
  9.     operator FieldType(void) const { return value; }
  10.     FieldType operator()(void) const { return value; }
  11. };
  12.  
  13. class A
  14. {
  15. public:
  16.     crazyconst<A, int> x;
  17.  
  18.     void doStuff()
  19.     {
  20.         // Gettin' stuff done
  21.         x = 5; // OK
  22.     }
  23. };
  24.  
  25. int main(int argc, char** argv)
  26. {
  27.     A a;
  28.     int b = a.x;
  29.     int c = a.x(); // also works
  30. }
Success #stdin #stdout 0.01s 2720KB
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https://ideone.com/8T1Po
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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