[Bug c++/14930] New: Friend declaration ignored

[Bug c++/14930] New: Friend declaration ignored

[austern at apple dot com]

Here's the code sample:
template<typename T> class Point;

template<> class Point<double> {
  friend class Plane;
  double v;
};

struct Plane {
  double get(const Point<double>& p);
};

double Plane::get(const Point<double> &p) { return p.v; }

Compiling this gives an error message:
foo.cc: In member function `double Plane::get(constPoint<double>&)':
foo.cc:7: error: `double Point<double>::v' is private
foo.cc:14: error: within this context

I can't find any justification for this error.  The only odd thing about this code sample is that the friend 
declaration is the first time we have encountered the name "Plane", but this is legal.  It even appears in 
one of the examples in clause 11.4 of the standard.

Note that this error is very delicate.  It goes away in the non-template case and it goes away if we use 
an impliict instantiation instead of an explicit specialization.

-- 
           Summary: Friend declaration ignored
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: austern at apple dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc-apple-darwin7.3.0
  GCC host triplet: powerpc-apple-darwin7.3.0
GCC target triplet: powerpc-apple-darwin7.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-04-12 23:12 -------
Confirmed, a regression from 2.95.3, looks related to PR 4403.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lerdsuwa at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |rejects-valid
      Known to fail|                            |3.0.4 3.2.3 3.3.1 3.3.3
                   |                            |3.4.0 3.5.0
      Known to work|                            |2.95.3
   Last reconfirmed|0000-00-00 00:00:00         |2004-04-12 23:12:39
               date|                            |
            Summary|Friend declaration ignored  |[3.3/3.4/3.5 Regression]
                   |                            |Friend declaration ignored
   Target Milestone|---                         |3.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[reichelt at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
           Severity|normal                      |critical
  GCC build triplet|powerpc-apple-darwin7.3.0   |
   GCC host triplet|powerpc-apple-darwin7.3.0   |
 GCC target triplet|powerpc-apple-darwin7.3.0   |
           Keywords|                            |monitored


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2004-06-06 03:38 -------
Retargeting to 3.4.1, being a regression on that release branch.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gdr at gcc dot gnu dot org
   Target Milestone|3.3.4                       |3.4.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-06-12 21:47 -------
Working on a fix.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |mark at codesourcery dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-06-14 15:52 -------
Subject: Bug 14930

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	mmitchel@gcc.gnu.org	2004-06-14 15:52:50

Modified files:
	gcc/cp         : decl.c name-lookup.c ChangeLog 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/template: friend30.C ptrmem10.C 

Log message:
	PR c++/15096
	* decl.c (grokdeclarator): Ignore pointer-to-members when
	computing template depth.
	
	PR c++/14930
	* name-lookup.c (pushtag): Do not try to put class declarations in
	explicit specialization scopes.
	
	PR c++/15096
	* g++.dg/template/ptrmem10.C: New test.
	
	PR c++/14930
	* g++.dg/template/friend30.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.1174.2.20&r2=1.1174.2.21
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/name-lookup.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.34.2.15&r2=1.34.2.16
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3892.2.122&r2=1.3892.2.123
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.206&r2=1.3389.2.207
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/friend30.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/ptrmem10.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-06-14 15:58 -------
Subject: Bug 14930

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	mmitchel@gcc.gnu.org	2004-06-14 15:58:54

Modified files:
	gcc/cp         : decl.c name-lookup.c ChangeLog 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/template: friend30.C ptrmem10.C 

Log message:
	PR c++/15096
	* decl.c (grokdeclarator): Ignore pointer-to-members when
	computing template depth.
	
	PR c++/14930
	* name-lookup.c (pushtag): Do not try to put class declarations in
	explicit specialization scopes.
	
	PR c++/15096
	* g++.dg/template/ptrmem10.C: New test.
	
	PR c++/14930
	* g++.dg/template/friend30.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&r1=1.1214&r2=1.1215
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/name-lookup.c.diff?cvsroot=gcc&r1=1.58&r2=1.59
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4094&r2=1.4095
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3854&r2=1.3855
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/friend30.C.diff?cvsroot=gcc&r1=1.1&r2=1.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/template/ptrmem10.C.diff?cvsroot=gcc&r1=1.1&r2=1.2



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930

[Bug c++/14930] [3.3/3.4/3.5 Regression] Friend declaration ignored

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-06-14 17:14 -------
Fixed in GCC 3.4.1.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14930