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  1. #include <iostream>
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. class X {
  6. 	public:
  7.  
  8. 	int a{0};
  9.  
  10. 	X() {
  11. 		std::cout << "X constructor \n";
  12. 	}
  13.  
  14. 	~X() {
  15. 		std::cout << "X destructor \n";
  16. 	}
  17.  
  18. 	X(const X& t)
  19.     {
  20.     	a = t.a;
  21.         cout << "Copy constructor called " << endl;
  22.     }
  23.  
  24.     X& operator=(const X& t)
  25.     {
  26.     	a = t.a;
  27.         cout << "Copy assignment operator called " << endl;
  28.         return *this;
  29.     }
  30.  
  31.     X(const X&& t)
  32.     {
  33.     	a = std::move(t.a);
  34.         cout << "Move constructor called " << endl;
  35.     }
  36.  
  37.     X& operator=(const X&& t)
  38.     {
  39.     	a = std::move(t.a);
  40.         cout << "Move assignment operator called " << endl;
  41.         return *this;
  42.     }
  43. };
  44.  
  45. std::function<void(int)> ff;
  46.  
  47. int main() {
  48. 	{
  49. 		auto x = std::make_shared<X>();
  50. 		// const auto x = new X();
  51. 		ff = [x](int t) {
  52. 			std::cout << x->a << " " << t << "\n";
  53. 		};
  54. 	}
  55.  
  56. 	ff(1);
  57. 	ff(2);
  58. 	ff(3);
  59. 	return 0;
  60. }
Success #stdin #stdout 0s 5516KB
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stdin
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Standard input is empty
stdout
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X constructor 
0 1
0 2
0 3
X destructor
https://ideone.com/KV3nq3
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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