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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class ITestA
  5. {
  6. public:
  7.     virtual void methodA() = 0;
  8. };
  9.  
  10. class ITestB : public ITestA
  11. {
  12. public:
  13.     virtual void methodB() = 0;
  14. };
  15.  
  16. template <class T>
  17. class CBaseAImpl : public T
  18. {
  19. public:
  20.     virtual void methodA() override
  21.     {
  22.         cout <<"A"; 
  23.     }
  24. };
  25.  
  26.  
  27. template <class T>
  28. class CBaseBImpl : public CBaseAImpl<T>
  29. {
  30. public:
  31.     virtual void methodB() override
  32.     {
  33.       cout <<"B"; 
  34.     }
  35. };
  36.  
  37. typedef CBaseAImpl<ITestA> CBaseA;
  38. typedef CBaseBImpl<ITestB> CBaseB;
  39.  
  40. int main() {
  41. 	CBaseB b;
  42.     b.methodA();
  43.     b.methodB();
  44.  
  45.     ITestA* a =&b;
  46.     a->methodA();
  47.  
  48.     ITestB *bp = &b;
  49.     bp->methodA();
  50.     bp->methodB();
  51.  
  52. 	return 0;
  53. }
Success #stdin #stdout 0s 4304KB
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ABAAB
https://ideone.com/B7JWER
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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