Deleting derived classes in std::unique_ptr<Base> containers

Question

I\'m a little confused. Basically, I\'ve got 2 different resource managers (AudioLibrary and VideoLibrary) that both inherit from a shared BaseLibrary class. This base class

Answer 1

This is due to the fact that you haven't declared your Media destructor virtual. As you can see, if you do, for example:

struct Media {
    virtual ~Media() = default;
};

struct AudioLibrary : Media {};
struct VideoLibrary : Media {};

int main() {
    std::map> map;
    map[0] = std::unique_ptr(new AudioLibrary());
    map[1] = std::unique_ptr(new VideoLibrary());
}

demo

both destructors will be called.