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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct SomeObject
  5. {
  6. 	SomeObject() : value(0), handle(0) {}
  7.  
  8. 	SomeObject(const SomeObject& o) : value(o.value), handle(o.handle) {
  9. 		std::cout << "Copy construct from " << this << " to " << &o;
  10. 	}
  11.  
  12. 	SomeObject(SomeObject&& o) : value(o.value), handle(o.handle) {
  13. 		std::cout << "Move construct from " << this << " to " << &o;
  14. 	}
  15.  
  16. 	void operator=(SomeObject const &o)
  17. 	{
  18. 		std::cout << "Copy from " << this << " to " << &o;
  19. 	}
  20. 	void operator=(SomeObject &&o)
  21. 	{
  22. 		std::cout << "Move from " << this << " to " << &o;
  23. 	}
  24.  
  25. 	/* example data */
  26. 	int value;
  27. 	int handle;
  28.  
  29. };
  30.  
  31. SomeObject copy_maybe(bool make_new, const SomeObject& def)
  32. {
  33. 	if (make_new)
  34. 		return SomeObject();
  35. 	else
  36. 		return def;
  37. }
  38.  
  39. int main() {
  40. 	SomeObject obj;
  41.  
  42. 	obj = copy_maybe(true, obj);
  43.  
  44. 	return 0;
  45. }
Success #stdin #stdout 0s 4396KB
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Standard input is empty
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Move from 0x7ffe67a3d7b0 to 0x7ffe67a3d7c0
https://ideone.com/BxpA4T
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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