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  1. class SomeBigData
  2. {
  3. public:
  4.     SomeBigData() = delete;
  5.     explicit SomeBigData(int) {}
  6. private:
  7.     char buffer[1024];
  8. };
  9.  
  10. class Interface
  11. {
  12. public:
  13.     Interface(int value, SomeBigData& data) : value(value), data(data) {}
  14.     ~Interface() {}
  15.  
  16.     virtual void function1() = 0;
  17.     virtual void function2() = 0;
  18. protected:
  19.     Interface(); // No implementation
  20. protected:
  21.     int value;
  22.     SomeBigData& data;
  23. };
  24.  
  25. class ImpOne : public virtual Interface
  26. {
  27. public:
  28.     void function1() override { ++value; }
  29. };
  30.  
  31. class ImpTwo : public virtual Interface
  32. {
  33. public:
  34.     void function2() override { --value; }
  35. };
  36.  
  37. class Device : public ImpOne, public ImpTwo
  38. {
  39. public:
  40.     Device(SomeBigData& data) : Interface(42, data) {}
  41. };
  42.  
  43. int main()
  44. {
  45.     SomeBigData data(42);
  46.     Device d(data);
  47.     d.function1();
  48.     d.function2();
  49.     return 0;
  50. }
  51.  
Success #stdin #stdout 0s 3336KB
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https://ideone.com/ZD336z
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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