C++ ライブラリはリフレクションとメタプログラミングをどのように実行するのでしょうか?

#include <typeinfo>

int main() {
    int x = 5;
    std::cout << typeid(x).name() << std::endl;  // 输出：int
    return 0;
}

template<typename... Args> struct TypeList;

template<typename Head, typename... Tail>
struct TypeList<Head, Tail...> {
    static const size_t size = sizeof...(Tail) + 1;
    static const std::tuple<Head, Tail...> tuple = std::make_tuple(Head, Tail...);
};

template<>
struct TypeList<> {
    static const size_t size = 0;
    static const std::tuple<> tuple = std::make_tuple();
};

#define UpperType(type) type ## _UPPER

#include <iostream>
#include <vector>

using namespace std;

class Base {
public:
    virtual void print() { cout << "Base" << endl; }
};

class Derived1 : public Base {
public:
    void print() override { cout << "Derived1" << endl; }
};

class Derived2 : public Base {
public:
    void print() override { cout << "Derived2" << endl; }
};

vector<Base*> objects;

int main() {
    objects.push_back(new Base());
    objects.push_back(new Derived1());
    objects.push_back(new Derived2());

    for (auto* object : objects) {
        cout << typeid(*object).name() << endl;  // 打印对象的类型
        object->print();                        // 调用适当的 `print` 方法
    }

    return 0;
}