G++ : pointers to overloaded function members problem

["Marc Mendez" <mmendez at paris dot sgi dot com>]

Originator : Marc Mendez
Organisation : SGI
Synopsis : "G++ : pointers to overloaded function members problem"
Severity : serious
Priority : medium
Category : C++
Class : rejects-legal
Release : 2.96-001117p1
OS : Turbolinux Beta3/IA64

Code sample :
**************** toto.h ******************
#ifndef TOTO_H
#define TOTO_H

class toto
{
public:
        toto(void) {}
        ~toto(void) {}

        static long fonction (long);
        static long fonction (long, char*);
};

#endif // TOTO_H
**************** toto.cpp ******************
#include "toto.h"

long toto::fonction (long l1)
{
        return l1;
}

long toto::fonction (long l1, char* str)
{
        return l1;
}
**************** main.cpp ******************
#include "toto.h"

// + correcting the bug ...
long _fonction_ (long l1)
{
        return toto::fonction (l1);
}

long _fonction_ (long l1, char* str)
{
        return toto::fonction (l1, str);
}
// - till there !

// guilty function
void XXXX (long (*f1)(long),
           long (*f2)(long, char*))
{
}

int main (void)
{
        // correct call
         XXXX (_fonction_,
              _fonction_);
        // guilty call !!!
        // XXXX (toto::fonction,
        //       toto::fonction);

        return 0;
}

The command used to compile are simply :
$ g++ -c toto.cpp
$ g++ -c main.cpp
$ g++ -o test toto.o main.o

When uncommenting the buggy release, this message appears :
$ g++ -c main.cpp
main3.cpp: In function `int main ()':
main3.cpp:28: assuming & on overloaded member function
main3.cpp:28: assuming & on overloaded member function
$

Thanks for your work,
    Marc.


Marc Mendez - Application Consulting Engineer

SGI Application Group
21, rue Albert Calmette
78350 Jouy-en-Josas - France

Tel.  : 33.(0)1.34.88.80.00
eMail : mmendez@paris.sgi.com
Web   : http://www.sgi.com/

###########################################################

# NB:INFORMATION IN THIS MESSAGE IS SGI CONFIDENTIAL. IT
# IS INTENDED SOLELY FOR THE PERSON(S) TO WHOM IT IS
# ADDRESSED AND MAY NOT BE COPIED, USED, DISCLOSED OR
# DISTRIBUTED TO OTHERS WITHOUT SGI CONSENT. IF YOU ARE
# NOT THE INTENDED RECIPIENT PLEASE WILL YOU NOTIFY ME BY
# EMAIL OR TELEPHONE, DELETE THE MESSAGE FROM YOUR SYSTEM
# IMMEDIATELY AND DESTROY ANY PRINTED COPIES.