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  1. #include <iostream>
  2.  
  3. class Whatever
  4. {
  5. private:
  6. 	int mSomeshit;
  7. public:
  8. 	Whatever() : mSomeshit(0) { }
  9.  
  10. 	Whatever(int someshit) : mSomeshit(someshit)
  11. 	{
  12. 		std::cout << "retain " << mSomeshit << std::endl;
  13. 	}
  14.  
  15. 	Whatever(Whatever& that) : mSomeshit(that.mSomeshit)
  16. 	{
  17. 		std::cout << "Copy c-tor" << std::endl;
  18. 		retain();
  19. 	}
  20.  
  21. 	Whatever(Whatever&& that) : Whatever()
  22. 	{
  23. 		std::cout << "Move c-tor" << std::endl;
  24. 		std::swap(mSomeshit, that.mSomeshit);
  25. 	}
  26.  
  27. 	Whatever& operator=(Whatever that)
  28. 	{
  29. 		std::cout << "Assignment operator" << std::endl;
  30. 		std::swap(mSomeshit, that.mSomeshit);
  31. 		return *this;
  32. 	}
  33.  
  34. 	~Whatever()
  35. 	{
  36. 		if (0 != mSomeshit)
  37. 			std::cout << "release " << mSomeshit << std::endl;
  38. 	}
  39.  
  40. 	void retain()
  41. 	{
  42. 		std::cout << "retain " << mSomeshit << std::endl;
  43. 	}
  44. };
  45.  
  46. class Context
  47. {
  48. public:
  49. 	Whatever createWhatever(int someshit)
  50. 	{
  51. 		return Whatever(someshit);
  52. 	}
  53. };
  54.  
  55. int main() {
  56. 	Context context;
  57.  
  58. 	auto whateverInstance1 = std::move(context.createWhatever(2));
  59. 	auto whateverInstance2 = std::move(context.createWhatever(5));
  60. 	auto whateverInstance3 = std::move(context.createWhatever(9));
  61.  
  62. 	whateverInstance1 = whateverInstance2;
  63.  
  64. 	whateverInstance2 = std::move(whateverInstance3);
  65.  
  66. 	return 0;
  67. }
Success #stdin #stdout 0s 3100KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
retain 2
Move c-tor
retain 5
Move c-tor
retain 9
Move c-tor
Copy c-tor
retain 5
Assignment operator
release 2
Move c-tor
Assignment operator
release 5
release 9
release 5
https://ideone.com/gIbd49
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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