fork download
copy 
  1. #include <iostream>
  2.  
  3. struct A
  4. {
  5. 	int val;
  6.  
  7. 	A(int val) : val(val) { std::cout << "A(int) val = " << val << '\n'; }
  8.  
  9. 	A(const A& other) : val(other.val) { std::cout << "A(const A&) val = " << val << '\n'; }
  10. 	A(A&& other) : val(other.val) { other.val = 0; std::cout << "A(A&&) val = " << val << '\n'; }
  11.  
  12. 	~A() { std::cout << "~A() val = " << val << '\n'; }
  13.  
  14. 	A& operator = (const A& rhs) { val = rhs.val; std::cout << "A& operator = (const A&) val = " << val << '\n'; return *this; }
  15. 	A& operator = (A&& rhs) { val = rhs.val; rhs.val = 0; std::cout << "A& operator = (A&&) val = " << val << '\n'; return *this; }
  16. };
  17.  
  18. A foo()
  19. {
  20. 	A a(77);
  21. 	return a;
  22. }
  23.  
  24. A bar()
  25. {
  26. 	A a(777);
  27. 	return std::move(a);
  28. }
  29.  
  30. int main()
  31. {
  32. 	{
  33. 		std::cout << "foo:\n";
  34. 		A a = foo();
  35. 	}
  36. 	{
  37. 		std::cout << "bar:\n";
  38. 		A v = bar();
  39. 	}
  40. }
Success #stdin #stdout 0s 3296KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
foo:
A(int) val = 77
~A() val = 77
bar:
A(int) val = 777
A(A&&) val = 777
~A() val = 0
~A() val = 777
https://ideone.com/APySue
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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!