constant in nested class in template class

I want to put constants in a nested class of a parameterized class like this:

PHP Code:

---

template<class x> class borka {
public:
    class borkb {
    public:
        static const int a;
    };

    static const a;
};

template<class x> const int borka<x>::a = 44; 
template<class x> const int borka<x>::borkb::a = 44;

int main(){
    cout << borka<int>::borkb::a << endl;
    cout << borka<int>::a << endl;
return 0;
}; 


---

And I get a link error in the nested class constant:
LNK2001: unresolved external symbol "public: static int const borka<int>::borkb::a" (?a@borkb@?$borka@H@@2HB)
Help anyone?

it works until you try:

Code:

---

cout << borka<int>::borkb::a << endl;

---

I dunno.

Z.

Yep, the reason i have that inner constant is to show that it works within a template class but not in one nested in such, constants in nested classes in regular classes works too, this is just the special case MSVC6 doesn't like :(

doesn't work with functions wither unless they are inline...
I'm sure it works somehow but the syntax is just too complicated.
I first thought it could be that classes nested in template classes automatically are templates too, but this doesn't work:

Code:

---

template<class x> const int borka<x>::borkb<x>::a = 44;

---

I get a lot of syntax errors. But maybe that helps you somehow. I'll continue my tries...

Have you tried on other compilers?

Nope, and I really want it to work with MSVC6, no matter how complicated the syntax gets.

Thanks :)

I give up ftm. I have a good book on such things which could help me, but I lent it to my cousin...

oh, no similar online stuff? When do you think you get your book back?

2-3 days after asking.
But to be honest, he needs it more than I do. He takes a programming class and has a bad teacher. It is a very thick book describing everything from the basics of both C and C++ to the most complicated things like nested templates.

Using typedef you can realize it for specializations:

Code:

---

typedef borka<int>::borkb bbint;
const int bbint::a = 44;

int main() {
    cout << borka<int>::borkb::a << endl;
    return 0;
}

---

doesn't work with unspecialized versions though...

Thank you so much! that will do :) unspecialized versions would be greater of course, but for the current case i'm on, I don't need it. If someone want's to extend my library then they'd had to specialize themselve ;)

Thanks again!

You're welcome. It's always fun to try to solve those.

Even more breaking news!

I made a class outside templated class with all the constants, and let the nested one inherited that one and guess what :D It works without specialisation :D

Dirty trick. But COOL! :cool: ;) :D