[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[reichelt at gcc dot gnu dot org]

------- Comment #5 from reichelt at gcc dot gnu dot org  2006-04-21 20:09 -------
Testing a patch.


-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |reichelt at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[patchapp at dberlin dot org]

------- Comment #6 from patchapp at dberlin dot org  2006-04-23 01:15 -------
Subject: Bug number PR c++/8171

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2006-04/msg00861.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[patchapp at dberlin dot org]

------- Comment #7 from patchapp at dberlin dot org  2007-10-30 07:20 -------
Subject: Bug number PR c++/8171

A patch for this bug has been added to the patch tracker.
The mailing list url for the patch is
http://gcc.gnu.org/ml/gcc-patches/2007-10/msg01789.html


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[aaw at gcc dot gnu dot org]

------- Comment #8 from aaw at gcc dot gnu dot org  2007-12-01 08:57 -------
Subject: Bug 8171

Author: aaw
Date: Sat Dec  1 08:56:55 2007
New Revision: 130554

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=130554
Log:
        PR c++/8171

        gcc/cp/
        * typeck.c (build_binary_op): Add conversion of pointers to function
        members appearing as operands to the equality operators.

        gcc/testsuite/
        * g++.dg/conversion/ptrmem9.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/conversion/ptrmem9.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/typeck.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[aaw at gcc dot gnu dot org]

------- Comment #9 from aaw at gcc dot gnu dot org  2007-12-01 09:08 -------
Fixed by revision 130554.


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aaw at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.3.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-06 03:17 -------
PR 18040 shows a testcase where we ICE and the problem is related to this testcase.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
OtherBugsDependingO|                            |18040
              nThis|                            |
   Last reconfirmed|2004-08-05 18:40:09         |2004-11-06 03:17:48
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[bangerth at dealii dot org]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171



------- Additional Comments From bangerth at dealii dot org  2003-07-22 20:23 -------
Just for more references into the standard: 4.11/2 describes the conversion
from pointer-to-member-of-base to ptm-of-derived. 5.10/2 states that this
conversion has to happen.

Just out of curiosity: the conversion is really not all that trivial, since
when you cast &B::f to &D::f you may need to use a thunk to adjust the
this pointer, right? Or is this implemented by having a pointer-to-
member-type be a tuple of pointer and this-adjustment?

W.

[Bug c++/8171] Cannot compare pointer to member function of base and derived class

[pinskia at physics dot uc dot edu]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8171


pinskia at physics dot uc dot edu changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at physics dot uc
                   |                            |dot edu
   Last reconfirmed|2003-05-03 00:00:00         |2003-07-22 19:00:10
               date|                            |


------- Additional Comments From pinskia at physics dot uc dot edu  2003-07-22 19:00 -------
Here is a shorter one that can be able to put in gcc's testsuite:
extern "C" void abort();
extern "C" void exit(int);

struct A
{
    int f() {}
};

struct B : A
{
};

int main()
{
    int (A::*pa)() = &A::f;
    int (B::*pb)() = &B::f;

    if(! (pa == pb))
        abort();
    exit(0);
}