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  1. #include <algorithm>
  2. #include <iostream>
  3. #include <utility>
  4. #include <vector>
  5.  
  6. class Foo final
  7. {
  8. public:
  9. 	Foo() : i_{}
  10. 	{
  11. 		std::cout << "Default Constructor" << std::endl;
  12. 	}
  13.  
  14. 	explicit Foo(const int i) : i_{i}
  15. 	{
  16. 		std::cout << "Parameterized Constructor: " << i_ << std::endl;
  17. 	}
  18.  
  19. 	Foo(const Foo& other) : i_{other.i_}
  20. 	{
  21. 		std::cout << "Copy Constructor: " << i_ << std::endl;
  22. 	}
  23.  
  24. 	Foo(Foo&& other) noexcept : i_{std::exchange(other.i_, 0)}
  25. 	{
  26. 		std::cout << "Move Constructor: " << i_ << "; other.i_: " << other.i_
  27. 			<< std::endl;
  28. 	}
  29.  
  30. 	Foo& operator=(const Foo& other)
  31. 	{
  32. 		i_ = other.i_;
  33.  
  34. 		std::cout << "Copy assignment operator: " << i_ << std::endl;
  35.  
  36. 		return *this;
  37. 	}
  38.  
  39. 	Foo& operator=(Foo&& other) noexcept
  40. 	{
  41. 		std::swap(i_, other.i_);
  42.  
  43. 		std::cout << "Move assignment operator: " << i_ << "; other.i_: "
  44. 			<< other.i_ << std::endl;
  45.  
  46. 		return *this;
  47. 	}
  48.  
  49. 	const int& i() const noexcept
  50. 	{
  51. 		std::cout << "Getter" << std::endl;
  52.  
  53. 		return i_;
  54. 	}
  55.  
  56. 	int& i()
  57. 	{
  58. 		std::cout << "Setter" << std::endl;
  59.  
  60. 		return i_;
  61. 	}
  62.  
  63. 	~Foo() noexcept
  64. 	{
  65. 		std::cout << "Destructor" << std::endl;
  66. 	}
  67.  
  68. private:
  69. 	int i_;
  70. };
  71.  
  72. int main()
  73. {
  74. 	std::cout << '1' << std::endl;
  75. 	std::vector<Foo> foos{ Foo{1994} };
  76.  
  77. 	std::cout << '2' << std::endl;
  78. 	std::for_each(foos.begin(), foos.end(),
  79. 		[](Foo& foo)
  80. 		{
  81. 			foo.i() /= 2;
  82. 		});
  83.  
  84. 	std::cout << '3' << std::endl;
  85. 	for (const Foo& foo : foos)
  86. 	{
  87. 		std::cout << foo.i() << ' ';
  88. 	}
  89. 	std::cout << std::endl;
  90.  
  91. 	return 0;
  92. }
Success #stdin #stdout 0s 5308KB
comments (?)
stdin 
Standard input is empty
stdout 
1
Parameterized Constructor: 1994
Copy Constructor: 1994
Destructor
2
Setter
3
Getter
997 
Destructor
https://ideone.com/FW6Pb9
language:
C++14 (gcc 8.3)
created:
23 hours ago
visibility:
public

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