From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Martin v. Loewis" <martin@mira.isdn.cs.tu-berlin.de>
To: mrs@wrs.com
Cc: oliva@dcc.unicamp.br, brendan@dgs.monash.edu.au, egcs@egcs.cygnus.com
Subject: Re: EGCS: pointer to member functions.
Date: Tue, 15 Jun 1999 23:27:00 -0000
Message-id: <199906160621.IAA00556@mira.isdn.cs.tu-berlin.de>
References: <199906152343.QAA22571@kankakee.wrs.com> <199906152343.QAA22571@kankakee.wrs.com>
X-SW-Source: 1999-06/msg00549.html

> Thanks, I think you've convinced me it might not be too hard to do
> this.

So easily convinced? :-) So what about assignment of
pointer-to-member?

struct FOO
{    public :
        virtual void f1();
};

extern FOO foo;
void (FOO::*fp)();

struct dummy{int i;};
struct S:dummy,FOO{
        virtual void f1();
};

void (S::*x)();

int bar()
{
  S *s = new S;
  FOO *foo = s;
  fp = &FOO::f1;
  (s->*fp)();      // Thunk expects vtable at offset 0
  x=fp;
  (s->*x)();       // vtable is at offset 4
}

Regards,
Martin

From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Martin v. Loewis" <martin@mira.isdn.cs.tu-berlin.de>
To: mrs@wrs.com
Cc: oliva@dcc.unicamp.br, brendan@dgs.monash.edu.au, egcs@egcs.cygnus.com
Subject: Re: EGCS: pointer to member functions.
Date: Wed, 30 Jun 1999 15:43:00 -0000
Message-ID: <199906160621.IAA00556@mira.isdn.cs.tu-berlin.de>
References: <199906152343.QAA22571@kankakee.wrs.com>
X-SW-Source: 1999-06n/msg00549.html
Message-ID: <19990630154300._W2VQ9QeoqDrAO3yBOPhVhZ4Wvsky6B6PJWNtpItsvs@z>

> Thanks, I think you've convinced me it might not be too hard to do
> this.

So easily convinced? :-) So what about assignment of
pointer-to-member?

struct FOO
{    public :
        virtual void f1();
};

extern FOO foo;
void (FOO::*fp)();

struct dummy{int i;};
struct S:dummy,FOO{
        virtual void f1();
};

void (S::*x)();

int bar()
{
  S *s = new S;
  FOO *foo = s;
  fp = &FOO::f1;
  (s->*fp)();      // Thunk expects vtable at offset 0
  x=fp;
  (s->*x)();       // vtable is at offset 4
}

Regards,
Martin