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  1. #include <iostream>
  2.  
  3. template <class T>
  4. class Singleton
  5. {
  6. private:
  7.     static T* instance;
  8.  
  9. protected:
  10.     Singleton<T>(  )
  11.     {
  12.         if ( instance == 0 )
  13.             instance = static_cast<T*>(this);
  14.     }
  15.  
  16. public:
  17.     static T* getInstancePtr(  )
  18.     {
  19.         return instance;
  20.     }
  21. };
  22.  
  23. template <class T> T* Singleton<T>::instance = 0;
  24.  
  25.  
  26. struct Console : public Singleton<Console> {};
  27.  
  28. int main()
  29. {
  30.     Console c1, c2;
  31.     std::cout << (&c1 != &c2);
  32. }
  33.  
Success #stdin #stdout 0.02s 2724KB
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https://ideone.com/Y0zPo
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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