Hi Donal,

On 07/05/2008, at 0:11, Donal K. Fellows wrote:

>  Destructors are run before the object command actually gets deleted; I
>  just checked! Since this is deep inside the complex mess that is  
>  traces,
>  I couldn't tell from what I remembered of the code. Thus, if a class
>  destructor (well, metaclass destructor I suppose) detaches the
>  subclasses and instances, they'll survive. That is to say, you can
>  change the current behaviour entirely through writing Tcl code. I hope
>  that does the trick for you. :-)

cool! yes, that will do it, thanks!

How do I create a metaclass destructor though (without going through  
the root oo::object destructor as in my example)? wouldn't I need  
self.destructor? (or maybe I'm getting (meta)confused given the hour ;-)

BTW, when I was trying to replicate in TclOO the destructor logging  
via mixin I used with XOTcl, I ran into the following:
   % oo::class create L { destructor {puts "  [self] destroyed"; next}}
   % oo::define oo::object mixin L
   may not mix a class into itself
       while executing
   "oo::define oo::object mixin L"

this appears to be triggered by the fact that L is a subclass of the  
class to be mixed into (i.e. oo::object).
maybe mixing into oo::object needs to be made an exception for the  
TclOOIsReachable() check in TclOODefineMixinObjCmd()?

when mixing L into oo:class instead, the mixed-in destructor did not  
get called at class destruction, is it not possible to mixin  
destructors?

Cheers,

Daniel

-- 
** Daniel A. Steffen                   **
** <mailto:das@[...].net>   **



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