[cfe-dev] Beginnings of C++ access control (and question about standard)

[Mike Stump]

On Apr 22, 2009, at 6:18 AM, Tim Northover wrote:
> I seem to have found similar in an even simpler example where hiding  
> private
> bases doesn't come up:
>
> class N {
> protected:
>        int m;
> };
>
> class P : public N {
>  int getX(N n) {
>    return n.m;
>  }
> };
>
> g++ (and comeau) complain that m is protected here, but I just can't  
> see how
> this can fail the condition:
>
> "— m as a member of N is protected, and R occurs [...] or in a  
> member or
> friend of a class P derived from N, where m as a member of P is  
> public,
> private, or protected, or"

Keep reading the standard...   Try all of 11.5  Protected member  
access, paying special attention to all the examples, then work back  
to the wording that gives rise to the examples.