fork(1) download
copy 
  1. #include <iostream>
  2. #include <string>
  3. #include <memory>
  4. #include <vector>
  5.  
  6. struct IFactory {
  7. 	typedef std::shared_ptr<IFactory> SharedFactory;
  8. 	virtual std::string Name() { return "IFactory"; }
  9. 	/** /
  10. 	template<class... Arg>
  11. 	SharedFactory Dup(const Arg&... A) {
  12. 		return std::make_shared<decltype(*this)>(A...);
  13. 	}
  14. 	/**/
  15. 	SharedFactory Dup() {
  16.  
  17. 		using T = decltype(*this);//なんでこれが参照型になるんじゃーーーーーー！！！
  18. 		T Y=*this;
  19.  
  20. 		//auto R = std::make_shared<>();
  21. 		//return R;
  22. 		return{};
  23. 	}
  24. };
  25.  
  26. class A :public IFactory {
  27. 	std::string Name() { return "A"; }
  28. 	bool Say() { std::cout << "Baw" << std::endl; }
  29. };
  30.  
  31. class B :public IFactory {
  32. 	std::string Name() { return "B"; }
  33. 	bool Say() { std::cout << "Maw" << std::endl; }
  34. };
  35.  
  36. typedef std::vector<IFactory::SharedFactory> FType;
  37.  
  38. FType MakeVector() {
  39. 	FType F = { std::make_shared<A>() ,std::make_shared<B>() };
  40.  
  41. 	return F;
  42. }
  43.  
  44. int main() {
  45. 	FType F = MakeVector();
  46.  
  47. 	auto A = F[0]->Dup();
  48.  
  49. 	std::cout << A->Name() << std::endl;
  50.  
  51. 	return 0;
  52. }
Runtime error #stdin #stdout 0s 4308KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/Bsu3iG
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!