#pragma once
#include<string>
class Object {
public:
virtual std::string ToString() const = 0;
virtual ~Object() {}
};
class Child : public Object {
public:
explicit Child(const std::string& class_id): class_id_(class_id) {}
std::string ToString() const override {
return class_id_;
}
private:
std::string class_id_;
};
class Factory {
public:
Object* Create(const std::string& class_id) {
return new Child(class_id);
}
void Register(const std::string& class_id,
Object* (*instance_creator)()) {}
private:
std::string class_id;
};