Default rule of five c++

class X
{
public:
   X() = default;
   
   X(X const& other) = default;
   X& operator=(X const& other) = default;
   
   X(X&& other) = default;
   X& operator=(X&& other) = default;
   
   ~X() = default;
};

Source: fluentcpp.com

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