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  1. #include <iostream>
  2. #include <algorithm>
  3.  
  4. class Base
  5. {
  6. 	protected:
  7. 	    std::string str;
  8. 	    void* ptr;
  9.  
  10. 	    void swap(Base &a, Base &b)
  11. 	    {
  12. 	    	using std::swap;
  13. 	    	swap(a.ptr, b.ptr);
  14. 	    	swap(a.str, b.str);
  15. 	    }
  16.  
  17. 	public:
  18. 		Base(std::string str, void* ptr) : str(str), ptr(ptr) {}
  19. 		Base(Base&& other) : str(), ptr(nullptr) {swap(other, *this);}
  20.  
  21. 		virtual ~Base() {}
  22. };
  23.  
  24. class Derived : public Base
  25. {
  26. 	protected:
  27. 		void* ptr2;
  28.  
  29. 		void swap(Derived &a, Derived &b)
  30. 		{
  31. 			using std::swap;
  32. 			swap(a.ptr2, b.ptr2);
  33. 		}
  34.  
  35. 	public:
  36. 		Derived(std::string str, void* ptr, void* ptr2) : Base(str, ptr), ptr2(ptr2) {}
  37.  
  38. 		/** copy-swap idiom*/
  39. 		Derived(Derived&& other) : Base(std::move(other)), ptr2(nullptr) {swap(other, *this);}
  40.  
  41. 		void Print() {std::cout<<Base::str<<"  "<<(char*)Base::ptr<<"  "<<(char*)ptr2<<"\n";}
  42. };
  43.  
  44. int main() 
  45. {
  46. 	char str[] = "100";
  47. 	char str2[] = "200";
  48.  
  49. 	Derived d = Derived("100", &str[0], &str2[0]);
  50.  
  51. 	Derived d2 = std::move(d);
  52. 	d2.Print();
  53.  
  54. 	//d.Print();  //Prints nothing.. it was moved..
  55.  
  56. 	return 0;
  57. }
Success #stdin #stdout 0s 3432KB
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Standard input is empty
stdout
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100  100  200
https://ideone.com/HCNLST
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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