Why pure virtual destructor should have body.

[murali2425]

Why we should provide body to pure virtual destructor?

Thanks

[ResidentBiscuit]

Because when anything deriving this class gets destructed, the base class destructor will be called also. If there's no body, then you've entered undefined behavior.

[ne555]

If there is no body it would not build properly.

You can do

class foo{
public:
   virtual ~foo() = default;
};