#include <string>
class Object {
public:
virtual std::string ToString() const = 0;
virtual ~Object() {}
};
class ObjIns : public Object {
public:
ObjIns(const std::string& class_id):
id(class_id) {}
std::string ToString() const override {
return id;
}
private:
std::string id;
};
class Factory {
public:
Factory() {}
Object* Create(const std::string& class_id) {
return new ObjIns(class_id);
}
void Register(const std::string& class_id, Object* (*func)()) {
}
};