[Bug c++/21901] New: Nested class has access to Nestee's private member functions

[Bug c++/21901] New: Nested class has access to Nestee's private member functions

[mhcox at bluezoosoftware dot com]

When compiling the following code I get no error (should get access violation 
on bar's constructor's access of foo's private foobar() ):
# 1 "bug050603.cc"
# 1 "<built-in>"
# 1 "<command line>"
# 1 "bug050603.cc"
class foo
{
public:
  foo() { }

  class bar
  {
  public:
    bar() { foo::foobar(); }
  };

private:
  static int foobar();
};

Note that this problems also occurs in 3.3.1 on a Solaris 2.6 Sparc box.  I 
don't have access to any newer compilers to see if it's fixed in latter 
releases.

I found one bug (12226) that sounds related.

Output of g++ -v:
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.3/specs
Configured with: /gcc/gcc-3.3.3-3/configure --verbose --prefix=/usr --exec-
prefi
x=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib --
mandir=/usr/s
hare/man --infodir=/usr/share/info --enable-
languages=c,ada,c++,d,f77,java,objc,
pascal --enable-nls --without-included-gettext --enable-libgcj --with-system-
zli
b --enable-interpreter --enable-threads=posix --enable-java-gc=boehm --enable-
sj
lj-exceptions --disable-version-specific-runtime-libs --disable-win32-registry
Thread model: posix
gcc version 3.3.3 (cygwin special)

-- 
           Summary: Nested class has access to Nestee's private member
                    functions
           Product: gcc
           Version: 3.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mhcox at bluezoosoftware dot com
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-03 15:29 -------
Why do you think this is invalid code and should be rejected?
This is accepted by Comeau's C++ compiler too.

I don't have the standard right in the front of me right now but I think this is valid code.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2005-06-03 17:46 -------
Nested class, like all other members of a class, have access to private 
and protected members. That's what the standard says. 
 
W. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[mhcox at bluezoosoftware dot com]

------- Additional Comments From mhcox at bluezoosoftware dot com  2005-06-04 17:17 -------
Subject: RE:  Nested class has access to Nestee's private member functions

>From my copy of the C++ standard (ISO/IEC 14882:1998(E)) [class.access.net]
11.8.1:

	The members of a nested class have no special access to members of
an enclosing class, nor to classes or
	Functions that have granted friendship to an enclosing class; the
usual access ruls (clause 11) shal be
	Obeyed.  The members of an enclosing class have no special access to
members of a nested class; the usual
	Access rules (clause 11) shall be obeyed.

I read suggestions that this should be changed in the next standard, but I
don't think it's changed yet.  Therefore, the resolution shouldn't be
INVALID.  It either needs to fixed or documented as a non-standard extension
(in anticipation of the next standard's changes).

Mike





 

-----Original Message-----
From: bangerth at dealii dot org [mailto:gcc-bugzilla@gcc.gnu.org] 
Sent: Friday, June 03, 2005 11:46 AM
To: mhcox@bluezoosoftware.com
Subject: [Bug c++/21901] Nested class has access to Nestee's private member
functions


------- Additional Comments From bangerth at dealii dot org  2005-06-03
17:46 ------- Nested class, like all other members of a class, have access
to private and protected members. That's what the standard says. 
 
W. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

------- You are receiving this mail because: ------- You reported the bug,
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-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[mhcox at bluezoosoftware dot com]

------- Additional Comments From mhcox at bluezoosoftware dot com  2005-06-04 17:20 -------
>From my copy of the C++ standard (ISO/IEC 14882:1998(E)) [class.access.net] 
11.8.1:

	The members of a nested class have no special access to members of an 
enclosing class, nor to classes or
	functions that have granted friendship to an enclosing class; the 
usual access rules (clause 11) shall be
	Obeyed.  The members of an enclosing class have no special access to 
members of a nested class; the usual
	Access rules (clause 11) shall be obeyed.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-04 17:37 -------
Reopening for a second to ...


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-06-04 17:38 -------
Mark as a dup of bug 359.

This was DR 45.

*** This bug has been marked as a duplicate of 359 ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901

[Bug c++/21901] Nested class has access to Nestee's private member functions

[bangerth at ices dot utexas dot edu]

------- Additional Comments From bangerth at ices dot utexas dot edu  2005-06-04 18:48 -------
Subject: RE:  Nested class has access to Nestee's private
 member functions


> I read suggestions that this should be changed in the next standard, but I
> don't think it's changed yet.  Therefore, the resolution shouldn't be
> INVALID.  It either needs to fixed or documented as a non-standard extension
> (in anticipation of the next standard's changes).

It is part of the Technical Corrigendum TC1 of the standard, however, and 
therefore (retroactively) considered part of C++98.

W.

-------------------------------------------------------------------------
Wolfgang Bangerth              email:            bangerth@ices.utexas.edu
                                www: http://www.ices.utexas.edu/~bangerth/



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21901