Access base member in a class, which derives from a nested class in a template class-CodePudding

I would like to have a template, which has nested class. Then I would like to have a template, which inherits the first template and also has a nested class. Then I would like this nested class to inherit his owner base nested class. I can do it, but I can't access members of the first nested class from another. What am I doing wrong, or is it impossible at all? Why? What have I do to fix the problem (if possible)/alternative decision (if impossible)?

template <class T, class T2>
class Class1
{
public:
    class NestedClass1;
};

template <class T, class T2>
class Class1<T, T2>::NestedClass1
{
public:
    void Do()
    {

    }
};

template <class T>
class Class2 : Class1<T, int>
{
public:
    class NestedClass2;
};

template <class T>
class Class2<T>::NestedClass2 final : Class2<T>::NestedClass1
{
public:
    void Do2()
    {
        this->Do(); // Why there is no "Do" in this?
    }
};

CodePudding user response：

That code of yours seems like it should not compile:

template <class T>
class Class2<T>::NestedClass2 final : Class2<T>::NestedClass1

Class2 does not have any NestedClass1 in it. It should be like that if I understood you correctly:

template <class T>
class Class2<T>::NestedClass2 final : Class1<T, int>::NestedClass1

CodePudding user response：

I am sorry for this silly question, because I have just checked this decision once more, and it seems to compile and work. The only problem is Visual Studio says, that I can't access base classes members (it simply doesn't show them), but I still can.