Effective C++ #9 after

main.cpp

#include <iostream>
#include <memory>

class Info {
public:
    Info(int id, std::string name){ this->id = id; this->name = name; }
    int id;
    std::string name;
};

class Base {
public:
    explicit Base(const Info& userInfo) { init(userInfo); }
    void log(const Info& userInfo) const {
        std::cout << userInfo.id << ", " << userInfo.name << std::endl;
    }
private:
    void init(const Info& userInfo) {
        std::cout << "do something" << std::endl;
        log(userInfo);
    }
};

class Derived : public Base {
public:
    Derived(int id, std::string name) : Base(*createInfo(id, name)) {};
private:
    static std::shared_ptr<Info> createInfo(int id, std::string name) {
        return std::make_shared<Info>(id, name); 
    }
};

int main(void){
    std::shared_ptr<Derived> ptr = std::make_shared<Derived>(123, "Honda");
    return 0;
}