partial template specialization for friend classes?

Question

I have a simple class X, and set of templatized classes Y. I\'d like all classes Y where the first templatization parameter happens to be X to be a friend of X i

Answer 1

The friend declaration page on cppreference.com specifies:

Friend declarations cannot refer to partial specializations, but can refer to full specializations

So as chtz said you can have a non-partial specialization friend.

Edit:

See also another answer on stackoverflow: https://stackoverflow.com/a/11046918/5776353