🚀 go-pugleaf

I am having difficulty finding language in the draft
that establishes the legality or illegality of the following:

class Forward;

class Any {
    friend int Forward::SomeFunc(int SomeArg);
    };

It certainly seems like a useful construct, and I don't
see any impossibility in implementing it, but I don't
have a compiler that accepts it (in fact, the Borland C++ v5.0
beta gets an internal compiler error on it). Can anyone
point me to relevant language in the draft that resolves
this question?

 Thanks,
 Ron Burk
 Windows Developer's Journal
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