class State final
{
public:
    // Add further new types here
    enum class Type
    {
        Intro,
        Menu,
        Loading
        // Etc
    };

    State(Type type) : type(type) {}

    void update() {
        switch (type)
        {
            // insert your giant switch here
        }
    }

private:
    // Add further dispatch functions here for every type
    void dispatchIntro() {}
    void dispatchMenu() {}
    void dispatchLoading() {}

private:
    Type type;
};