Path: utzoo!attcan!uunet!mcvax!hp4nl!tnosoes!tom
From: tom@tnosoes.UUCP (Tom Vijlbrief)
Newsgroups: comp.lang.c++
Subject: Re: CFRONT braindamaged? (Or me?)
Message-ID: <439@tnosoes.UUCP>
Date: 10 Feb 89 16:03:28 GMT
References: <2205@galaxy>
Organization: TNO Institute for Perception, Soesterberg, The Netherlands
Lines: 67

dave@andromeda.rutgers.edu (Dave Bloom) writes:

>Hi there. We're running AT&T's C++ Ver 1.2.1, and as far as I'm
>concerned, the following should work hunky-dorey. Does anybody
>see anything wrong with my syntax?

Yes, gnu g++ 1.32 reports:
t.c:8: assignment between incompatible pointer types
t.c:9: assignment between incompatible pointer types
t.c:10: assignment between incompatible pointer types

This can be corrected:
======================
       class zz {
           public:
                void    (zz::* xx)(char *);
               void a(char* s) { printf("function a: %s\n", s); }
               void b(char* s) { printf("function b: %s\n", s); }
               void c(char* s) { printf("function c: %s\n", s); }
               zz(int i) {
                       if(i==0)        xx= &(zz::a);
                       else if(i==1)   xx= &(zz::b);
                       else            xx= &(zz::c);
                       } 
       };
       main()
       {
               zz dave(1);
               dave.xx("Yes!!!");
       } 

==========
This produces:

t.c:17: invalid call via pointer-to-member function

Changing the code to:
 
       class zz {
           public:
                void    (zz::* xx)(char *);
               void a(char* s) { printf("function a: %s\n", s); }
               void b(char* s) { printf("function b: %s\n", s); }
               void c(char* s) { printf("function c: %s\n", s); }
               void e() { xx(this, "yes"); }
               zz(int i) {
                       if(i==0)        xx= &(zz::a);
                       else if(i==1)   xx= &(zz::b);
                       else            xx= &(zz::c);
                       } 
       };
       main()
       {
               zz dave(1);
               dave.e();
       } 
======
produces the correct result.

Tom
===============================================================================
Tom Vijlbrief
TNO Institute for Perception
P.O. Box 23				Phone: +31 34 63 62 77
3769 ZG  Soesterberg			E-mail: tnosoes!tom@mcvax.cwi.nl
The Netherlands				    or:	uunet!mcvax!tnosoes!tom
===============================================================================