Re: poseAs: problem

[Stefan Böhringer]

I don't know about the Gnustep runtime. However, the NeXT runtime
requires you to call +poseAs: before an instance of the posed class is
created. It is plausible that at that point in time it should not be a
problem for the runtime to substitute classes.

Try placing your +poseAs: method in the main function (or substantially
earlier than what you do currently).

Hope that helps.

Stefan


On 30 Aug 2001 16:00:10 -0700, (null) wrote:
> On Thu, 30 Aug 2001 16:20:25 -0600
> Adam Fedor <fedor@doc.com> wrote:
> > Chris B. Vetter wrote:
> > That's an interesting set of problems. Are you doing poseAs: in gdnc or 
> > in another program?
> > Behaps you can debug gdnc. It's not obvious how to do this. Hopefully 
> > you've compiled the base library with make debug=yes, then:
> > defaults write NSGlobalDomain debug YES
> > Then use gdb:
> > gdb gdnc
> >  > run
> > Then do whatever you did to crash gdnc, then type a 'bt' in gdb.
> 
> All I do is 'openapp MyApp.app' ... 
> 
> No, I'm not meddling with gdnc (that is, directly). Basically, what
> I do is (in AppController.m)
> 
> - (void) applicationDidFinishLaunching: (NSNotification *) aNotification
> {
>   if([[appPreferences objectForKey: @"UseMyClass"]
>                    isEqualToString: @"YES"])
>     [MyClass setup];
> 
>   return;
> }
> 
> and in MyClass.m
> 
> + (id) setup
> {
>   [self poseAs: [NSObject class]];
> 
>   return self;
> }
> 
> I also tried [[self class] poseAs: [NSObject class]]; - same result.
> The actual setup is done later, not in +setup. I do, however, replace
> objc_error with my own error handler.
> 
> Interestingly, if I use [Object class] instead, everything works but
> that's not what I had in mind originally, so is not of much use.
> 
> >From playing around and using NSLog() a lot, I could trace the problem
> to the -poseAs: call.
> 
> First, I will get a timeout warning, then gdnc crashes - and, as I
> said, after restarting gdnc by hand (starting any application, which
> _should_ automatically re-start gdnc will NOT work) I get that "no
> runtime info for MyClass" message until I remove Cache/:0.0
> 
> Maybe I should do the actual setup BEFORE calling -poseAs: ...
> 
> -- 
> Chris