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  1. #include "iostream"
  2.  
  3. class Logger
  4. {
  5. public:
  6.     Logger(std::string name) : name_(name) {}
  7.     void log(std::string msg) { std::cout << name_ << ": " << msg << std::endl; }
  8. private:
  9.     std::string name_;
  10. };
  11.  
  12. template<typename T>
  13. class LoggerImp : public Logger
  14. {
  15. public:
  16.     LoggerImp(const std::string& n) : Logger(n) {}
  17. };
  18.  
  19. class B : private LoggerImp<B>
  20. {
  21.     typedef LoggerImp<B> LL;
  22. public:
  23.     B() : LoggerImp<B>("Class B" ) {}
  24.     void doSomethingInB()
  25.     {
  26.         LL::log("B doing something");
  27.     }
  28. };
  29.  
  30. class C : public B, private LoggerImp<C>
  31. {
  32.     typedef LoggerImp<C> LL;
  33. public:
  34.     C() : LoggerImp<C>("Class C" ) {}
  35.     void doSomethingInC()
  36.     {
  37.         LL::log("C doing something");
  38.     }
  39. };
  40.  
  41. int main()
  42. {
  43.     B* b = new B();
  44.     C* c = new C();
  45.  
  46.     b->doSomethingInB();
  47.  
  48.     c->doSomethingInC();
  49.     c->doSomethingInB();
  50.  
  51.     return 0;
  52. }
Success #stdin #stdout 0s 3476KB
comments (?)
stdin 
Standard input is empty
stdout 
Class B: B doing something
Class C: C doing something
Class B: B doing something
https://ideone.com/lFVfxU
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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