Hello,
I have some code that works when I make class classA public. But I only want
class classA to be accessible by itself and class classB. So the problem is
very concrete: make classB a friend of classA.
Here is the code that describes both classes.
template <class T, int C> class classA;
template <class T, int C, classA<T,C> &instanceA> class classB;
template <class T, int C> class classA
{
template <classA &instanceA> friend class classB;
private:
int for_use_by_classB;
};
template <class T, int C, classA<T,C> &instanceA> class classB
{
classB (int i) { instanceA.for_use_by_classB = i; }
};
// instantiation gives error
// template class classA<char,128>;
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