C++ - 在不使用RTTI/dynamic_cast的情况下向下转换钻石形状的继承对象

class Base {
public:
    virtual void baseFunction() {
        // ...
    }
};

class DerivedA : public Base {
public:
    void derivedAFunction() {
        // ...
    }
};

class DerivedB : public Base {
public:
    void derivedBFunction() {
        // ...
    }
};

class Diamond : public DerivedA, public DerivedB {
public:
    void diamondFunction() {
        // ...
    }
};

int main() {
    Diamond diamond;
    Base* base = ⋄
    DerivedA* derivedA = ⋄
    DerivedB* derivedB = ⋄

    // 向下转换
    DerivedA* diamondAsDerivedA = static_cast<DerivedA*>(base);
    DerivedB* diamondAsDerivedB = static_cast<DerivedB*>(base);

    // 调用派生类的方法
    diamondAsDerivedA->derivedAFunction();
    diamondAsDerivedB->derivedBFunction();

    return 0;
}