C#에서의 ArrayList를 C++에서 구현

class Loadable {
  virtual ~Loadable() {}
};
 
class SomeClass {
  ...
};
 
class LoadableSomeClass : public SomeClass, public Loadable {
public:
  LoadableSomeClass(const SomeClass &value): SomeClass(value) {}
};
 
class LoadableInt : public Loadable {
public:
  LoadableInt(int value = 0): value(value) {}
  int operator() () const {return value;}
  int value;
};
 
class ArrayList {
  ...
  void append(int i, Loadable *item) {m_array[i] = item;}
  Loadable *get(int i) const {return m_array[i];} 
private:
  std::vector<Loadable*> m_array;
};
 
int main() {
  ArrayList list;
  list.append(new LoadableSomeClass(SomeClass(...)));
  list.append(new LoadableInt(2));
  ...
}