[Xotcl] Help: Meta-class and derived Classes -- Ignore Please

[Sheik Yussuff]

Please ignore previous post as it was
a trivial problem.

Thanks.
--sheik
----- Original Message ----- 
From: Sheik Yussuff <sheik at carib-link.net>
To: <xotcl at alice.wu-wien.ac.at>
Sent: Saturday, July 21, 2001 11:41 PM
Subject: [Xotcl] Help: Meta-class and derived Classes


> Class A is a derived class of meta-class Consultation.
> In the filter conFilter I would like to obtain
> the class of the object that received the message "m"
> when invoking the command: [a m 123]. That is, the
> class of the original receiver of method "m".
> (Please see code below).
> 
> Thanks for any help.
> 
> Regards
> sheik
> .........................................................
> #Code:
> Class Consultation  -superclass Class
> 
> Consultation instproc conFilter args {
>   set method [self calledproc]
>   
>   #The following is of course not correct!
>   #[self class] evaluates to Consultation;
>   #I need it to evaluate to A. Help!!
> 
>   if {[[self class] info instprocs $method] == ""} {
>     if { [[self] exists delegate] } {
>       return [eval [[self] set delegate] $method $args]
>     } 
>   } 
>   next
> }
> 
> Consultation instproc init args {
>   [self] instproc setDelegate {d} {
>     [self] set delegate $d
>   }
>   next
>   [self] filterappend [self class]::conFilter
> }
> 
> Consultation A -parameter delegate
> 
> 
> A instproc m {x} {
>   puts "[self] [self class] [self proc] $x"
>   return [next]
> }
> 
> Class B
> B instproc m {x} {
>   puts "[self] [self class] [self proc] $x"
>   return [next]
> }
> 
> A a
> B b
> a setDelegate b
> # send message m to object a
> puts "result = [a m 123]"
> 
> 
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