使用模板将std::shared_ptr<Derived>向上转换为std::shared_ptr<Base>

#include <iostream>
#include <memory>

class Base {
public:
    virtual ~Base() = default;
};

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

int main() {
    std::shared_ptr<Derived> derived_ptr = std::make_shared<Derived>();

    // 将 std::shared_ptr<Derived> 向上转换为 std::shared_ptr<Base>
    std::shared_ptr<Base> base_ptr = std::static_pointer_cast<Base>(derived_ptr);

    // 使用 dynamic_cast 检查转换是否成功
    std::shared_ptr<Derived> derived_ptr_check = std::dynamic_pointer_cast<Derived>(base_ptr);
    if (derived_ptr_check) {
        std::cout << "Conversion successful" << std::endl;
        derived_ptr_check->print();
    } else {
        std::cout << "Conversion failed" << std::endl;
    }

    return 0;
}