Freind class function inaccessible because of template

[Putarda]

So function from class A is not available to class B because B has a template type and A can't recognize which type to be friended. Does anyone know what is the problem? Thanks. Here is the code:

class A {

    template<typename N>
    friend class B<N>;

    void foo() {
    }

};

template<typename T>
class B {

public:

    void foo2(A a) {
        a.foo(); //error says "private 'A::foo()' is inaccessible"
    }

};

[coder777]

Take a look here:

https://stackoverflow.com/questions/3292795/how-to-declare-a-templated-struct-class-as-a-friend

[Peter87]

Remove <N>

template<typename N>
friend class B<N>;