https://en.cppreference.com/w/cpp/language/destructor https://en.cppreference.com/w/cpp/language/destructor Take a look at "Destruction sequence" but basically

https://en.cppreference.com/w/cpp/language/destructor https://en.cppreference.com/w/cpp/language/destructor Take a look at "Destruction sequence" but basically the destructors are chained together and called one after another to free all resources rather than forming one destructor for the derived object. That being said it is still effectively one object in memory.