accessibility rules

Hi,

What is the expected behavior of the code below (basically the
assignments through pd in frb). This is quiet similar to the example
in $11.2/5, except that I have protected inheritance in my example. My
confusion stems from the fact that VS and Comeau give error in all the
three assignments using pd whereas GCC gives error only in the
statement (pd->prvt++).

With reference to $11.2/4 and $11.2/5, I believe with R=frb, the base
"abase" is inaccessible in "aderived".

struct aderived;

struct abase{
     abase() : pblc(0), prtd(0), prvt(0){}
public:
     int pblc;
protected:
     int prtd;
private:
     int prvt;

     friend void frb(abase *pb, aderived *pd);
};

struct aderived : protected abase{
};

void frb(abase *pb, aderived *pd){
     pb->pblc++;
     pb->prtd++;
     pb->prvt++;

     pd->pblc++;
     pd->prtd++;
     pd->prvt++;
}

int main(){}

Regards,
Dabs

--
      [ See http://www.gotw.ca/resources/clcm.htm for info about ]
      [ comp.lang.c++.moderated. First time posters: Do this! ]