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  1. #include <iostream>
  2. #include <typeinfo>
  3. using namespace std;
  4.  
  5. template <class T>
  6. struct traitFoo: public T {
  7. 	traitFoo():T(){}
  8. 	virtual ~traitFoo(){}
  9. 	virtual void foo()
  10. 	{ 
  11. 		cout << typeid(this).name() << " " << typeid(T).name() << " foo" << endl;
  12. 		cout << this->i << endl; // Раскомментируйте для боли - всё ок
  13. 	}
  14. };
  15.  
  16. struct baseStruct {};
  17. template <typename T>
  18. struct withi : baseStruct {T i;};
  19. struct bar : public withi<int>{};
  20. struct baz : public withi<float>{};
  21.  
  22. int main() {
  23. 	using BarFoo = traitFoo<bar>;
  24. 	using BazFoo = traitFoo<baz>;
  25.  
  26. 	BarFoo rfoo;
  27. 	rfoo.i = 1.5;
  28. 	BazFoo zfoo;
  29. 	zfoo.i = 1.5;
  30. 	rfoo.foo();
  31. 	zfoo.foo();
  32.  
  33. 	// Как сюда дабавить хранение BarFoo и BazFoo в общем массиве? - вроде норм
  34. 	baseStruct arr[2] = { rfoo, zfoo };
  35.  
  36. 	return 0;
  37. }
Success #stdin #stdout 0s 3472KB
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P8traitFooI3barE 3bar foo
1
P8traitFooI3bazE 3baz foo
1.5
https://ideone.com/5gphOY
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
secret

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