[Bug c++/11952] REGRESSION: friend declaration handled as function call concerning access.

["victor dot judin at materna dot de" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From victor dot judin at materna dot de  2004-08-27 11:04 -------
Subject: AW:  REGRESSION: friend declaration handled as fun
	ction call concerning access.

>> class B
>> {
>> //...
>> friend class A();
>> };
>> the visibility of A::f() remains private.
>>
>I cannot comment on this because the testcase is invalid, you cannot 
>write "friend class A()". I don't know what you meant.
Sorry, I meant 
	friend class A;
of course.


-----Ursprüngliche Nachricht-----
Von: giovannibajo at libero dot it [mailto:gcc-bugzilla@gcc.gnu.org]
Gesendet: Freitag, 27. August 2004 13:01
An: victor.judin@materna.de
Betreff: [Bug c++/11952] REGRESSION: friend declaration handled as
function call concerning access.



------- Additional Comments From giovannibajo at libero dot it  2004-08-27
11:00 -------
> Sorry, that's totally idiotic.

Please, moderate your language.

> If I have 
> class A
> {
>  void f();
> public: 
>  A();
> ~A();
> };
> and 
> class B
> {
> //...
> friend class A();
> };
> the visibility of A::f() remains private.
>
I cannot comment on this because the testcase is invalid, you cannot 
write "friend class A()". I don't know what you meant.


The bug reported here is indeed invalid. The original testcase is the
following:

class A {
  void f();
};

struct B {
  friend void A::f();
};

the friend declaration means that A::f() is able to access B's private
members. 
But the declaration is invalid because A::f() is a private function, and
thus 
it is not accessible from B's scope. The standard says this very clearly:

"A name nominated by a friend declaration shall be accessible in the scope
of 
the class containing the friend declaration"

This is also mentioned in our webpage about recent changes to the compiler, 
http://gcc.gnu.org/gcc-3.4/changes.html.

-- 
           What    |Removed                     |Added
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                 CC|                            |giovannibajo at libero dot
                   |                            |it


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11952

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11952