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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5.     class A
  6.     {
  7.     public:
  8.       virtual void call_bar() = 0;
  9.       virtual ~A() {}
  10.     };
  11.  
  12.     template <typename T>
  13.     class B : public A
  14.     {
  15.     public:
  16.       virtual void call_bar() override
  17.       {
  18.         bar(static_cast<T*>(this));
  19.       }
  20.     };
  21.  
  22.     class C: public B<C>
  23.     {
  24.     };
  25.  
  26.     void bar(C* c)
  27.     {
  28.     	cout << "C" << endl;
  29.     }
  30.  
  31.     typedef std::vector<A*> a_list;
  32.  
  33. int main() {
  34. 	C c;
  35. 	A* a = &c;
  36. 	a->call_bar();
  37.  
  38. 	a_list b;
  39. 	b.push_back(a);
  40. 	for(auto& ref : b)
  41. 		ref->call_bar();
  42. 	// your code goes here
  43. 	return 0;
  44. }
Success #stdin #stdout 0s 3456KB
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C
C
https://ideone.com/x58ml0
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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