[Bug c++/29615] Class can't be friends of itself?

[redi at gcc dot gnu dot org]

--- Comment #5 from redi at gcc dot gnu dot org  2010-03-27 20:14 ---
With current versions this is only a warning not an error, changing keywords
from rejects-valid to diagnostic

(In reply to comment #3)
 There is no other way to make a member-variable accessible only from all
 objects which are of the same type. Am I wrong?

Yes.

(In reply to comment #4)
 The error doesn't occur if the friend is a template instance, so it really
 doesn't hurt anyone. But it's weird.
 
 template int z 
 class F {
 friend class F0; // error only if 0 removed
 };

Well in that case it isn't friends with itself, so not really weird.

This shows that being a template has nothing to do with it:

template int z 
class F {
friend class Fz;
};

warning: class ‘Fz’ is implicitly friends with itself


-- 

redi at gcc dot gnu dot org changed:

   What|Removed |Added

   Keywords|rejects-valid   |diagnostic


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[redi at gcc dot gnu dot org]

--- Comment #6 from redi at gcc dot gnu dot org  2010-03-27 20:19 ---
I think the warning is reasonable, but it would be nice if it could be
disabled.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[potswa at mac dot com]

--- Comment #4 from potswa at mac dot com  2010-03-26 21:08 ---
The error doesn't occur if the friend is a template instance, so it really
doesn't hurt anyone. But it's weird.

template int z 
class F {
friend class F0; // error only if 0 removed
};

template class F0;


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[jens-devel at gmx dot de]

--- Comment #3 from jens-devel at gmx dot de  2007-10-15 12:48 ---
Subject:  Class can't be friends of itself?

Hi,

I think gcc should be able to compile something like this.
There is no other way to make a member-variable accessible only from all
objects which are of the same type. Am I wrong?

test.cpp
class A
{
  friend class A;

  private:
int var_accessible_from_all_A_objects;
};

int main() { return 0; }
/test.cpp

Greetings
Jens


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[pcarlini at suse dot de]

-- 

pcarlini at suse dot de changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |pcarlini at suse dot de
   |dot org |
 Status|NEW |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[pcarlini at suse dot de]

-- 

pcarlini at suse dot de changed:

   What|Removed |Added

 AssignedTo|pcarlini at suse dot de |unassigned at gcc dot gnu
   ||dot org
 Status|ASSIGNED|NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[pinskia at gcc dot gnu dot org]

--- Comment #2 from pinskia at gcc dot gnu dot org  2006-10-28 18:44 ---
As far as I can tell this has been a pedwarning since the begining of the C++
front-end.


-- 

pinskia at gcc dot gnu dot org changed:

   What|Removed |Added

   Keywords||rejects-valid


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615

[Bug c++/29615] Class can't be friends of itself?

[bangerth at dealii dot org]

--- Comment #1 from bangerth at dealii dot org  2006-10-27 22:57 ---
Confirmed.


-- 

bangerth at dealii dot org changed:

   What|Removed |Added

 CC||bangerth at dealii dot org
 Status|UNCONFIRMED |NEW
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2006-10-27 22:57:33
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29615