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  1. #include <string>
  2. #include <iostream>
  3. #include <memory>
  4.  
  5. class WenigDaten {
  6. public:
  7. 	virtual std::unique_ptr<WenigDaten> Copy () const { 
  8. 		return std::make_unique<WenigDaten>(*this); 
  9. 	}
  10. 	virtual std::string Name () const { return "WenigDaten"; };
  11. };
  12.  
  13. class BisselDaten : public WenigDaten {
  14. public:
  15. 	std::unique_ptr<WenigDaten> Copy () const override {
  16. 		return std::make_unique<BisselDaten>(*this);
  17. 	}
  18. 	std::string Name () const override { return "BisselDaten"; };
  19. };
  20.  
  21. int main () 
  22. {
  23. 	std::unique_ptr<WenigDaten> erstes = std::make_unique<BisselDaten>();
  24. 	const WenigDaten& erstes_ref = *erstes.get();
  25.  
  26. 	std::cout << "original: "<< erstes_ref.Name() << "\n";
  27.  
  28. 	auto zweites = erstes_ref;
  29. 	std::cout << "sliced: " << zweites.Name() << "\n";  
  30.  
  31. 	auto drittes = erstes_ref.Copy();
  32. 	std::cout << "deep-copy: " << drittes->Name() << "\n";
  33.  
  34. 	auto viertes = static_cast<const BisselDaten&>(erstes_ref);
  35. 	std::cout << "copy: " << viertes.Name() << "\n";
  36.  
  37. 	return 0;
  38. }
Success #stdin #stdout 0s 5272KB
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stdin
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Standard input is empty
stdout
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original: BisselDaten
sliced: WenigDaten
deep-copy: BisselDaten
copy: BisselDaten
https://ideone.com/NDZT47
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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