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  1. #include <iostream>
  2.  
  3. struct Extension
  4. {
  5. 	void f(){std::cout<<"f"<<std::endl;}
  6. 	float g(int x, float y, int z)
  7. 	{
  8. 		std::cout << "x = " << x << std::endl
  9. 		          << "y = " << y << std::endl
  10. 		          << "z = " << z << std::endl;
  11. 		return 4.5f;
  12. 	}
  13. };
  14.  
  15. template<typename R, typename... Args>
  16. R CallExtMF(Extension &ext, void *f, Args... args)
  17. {
  18. 	R (Extension::*mfp)(Args...) = *reinterpret_cast<R (Extension::**)(Args...)>(&f);
  19. 	return (ext.*mfp)(args...);
  20. }
  21.  
  22. int main()
  23. {
  24. 	void *f = reinterpret_cast<void *>(&Extension::f);
  25. 	void *g = reinterpret_cast<void *>(&Extension::g);
  26.  
  27. 	Extension e;
  28.  
  29. 	CallExtMF<void>(e, f);
  30. 	float p = 2.5f;
  31. 	float rv = CallExtMF<float>(e, g, 1, *reinterpret_cast<int *>(&p), 3);
  32. 	std::cout << "rv = " << rv << std::endl;
  33. }
  34.  
Success #stdin #stdout 0s 3340KB
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stdin
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Standard input is empty
stdout
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f
x = 1
y = 2.5
z = 3
rv = 4.5
https://ideone.com/OnsDWr
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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