How to define alias to access enum class member through struct?

Question

Given the following code:

class A {
    enum class B {
        Member
    };
    struct C {
    };
};

How can I define a type alias that allows me to access B::Member as C::B::Member?

Answer 1

struct C {
    using B = A::B;
    // or: typedef A::B B;
};