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  1. #include <iostream>
  2. #include <vector>
  3. #include <memory>
  4. using namespace std;
  5.  
  6. struct A { void what_type() { cout<<"A"<<endl; }};
  7. struct B { void what_type() { cout<<"B"<<endl; }};
  8. struct U { void what_type() { cout<<"U"<<endl; }};
  9. struct V { void what_type() { cout<<"V"<<endl; }};
  10.  
  11. class MyCommonAncestor {
  12. public:  
  13.     virtual void common_operation1()=0;
  14.     virtual ~MyCommonAncestor() {}
  15. }; 
  16.  
  17. template <class X, class Y> 
  18. class MyTemplateClass : public MyCommonAncestor {
  19.     X myx; 
  20.     Y myY; 
  21. public:  
  22.     void common_operation1() override {  // addresses specific objects of type X and Y
  23.     	myx.what_type();
  24.     	myY.what_type();
  25.     }; 
  26.     X operation2(const Y& y) {}; 
  27.     ~MyTemplateClass() {   // to demonstrate automatic destruction for shared ptr
  28.     	cout<<"object destroyed"<<endl;
  29.     } 
  30. };
  31.  
  32. int main() {
  33. 	vector<shared_ptr<MyCommonAncestor>> myVector; 
  34. 	myVector.push_back(make_shared<MyTemplateClass<A,B>>()); 
  35. 	myVector.push_back(make_shared<MyTemplateClass<U,V>>()); 
  36. 	for (auto& x: myVector)
  37. 	    x->common_operation1(); 
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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A
B
U
V
object destroyed
object destroyed
https://ideone.com/Xl2sKr
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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