Not sure what you mean here, std::unique_ptr is for when you want to auto destruct a ptr when going out of scope (ref counting limited to one) and std::shared_p

Not sure what you mean here, std::unique_ptr is for when you want to auto destruct a ptr when going out of scope (ref counting limited to one) and std::shared_ptr is normal reference counting, they aren't alternatives to each other but specific things for specific situations?