Re: PATCH: Merge objc-improvements-branch to mainline

[Ziemowit Laski]

On Friday, Sep 26, 2003, at 15:08 US/Pacific, M. Grabert wrote:

> On Wed, 24 Sep 2003, Ziemowit Laski wrote:
>
> > On Wednesday, Sep 24, 2003, at 16:55 US/Pacific, Nicolas Roard wrote:
> >
> > > What I don't understand, is that we _already_ have an exception 
> > > system,
> > > so what was those requests about ?
> > > If NS_DURING/NS_HANDLER names scared programmers, well, we could
> > > define them as @try ... @catch :-)
> > > But I don't see what's so interesting with the new exception system,
> > > apart
> > > to bring some incompatibilities ...
> > > Someone could explain it to me ?
> >
> > See previous e-mails from Stan and myself. :-)
> >
> > Which reminds me, I did forget to mention yet 2 more benefits:
> > - The exception system will automatically mark variables volatile as
> > needed, so that they do not get clobbered by the _setjmp/_longjmp
> > interaction.
> > - If an exception is not handled by any of your @catch clauses, it is
> > automatically propagated up the call chain
> >
> > All in all, it makes exceptions in ObjC much more accessible to those
> > coming from C++ or Java.
>
> Well, as I understand it there is one more benefit:
>
> - it doesn't require an OPENSTEP implementation
>
>
> But as a user I actually would prefer something like
>
> http://users.pandora.be/stes/block98/index.html
>
> Now THAT's something many users request for objc (just search the gcc-
> and GNUstep-mailing lists). I can happily live without @catch and
> @throw, but "objc blocks" is something I really like to see in gcc
> (in a platform independent implementation).

I must admit I've never heard a request for this from Mac OS X 
Objective-C
users, although I realize that they comprise a mere 99% of all 
Objective-C
developers world-wide... :-) :-) :-)

Still, if you're willing to implement this feature, and do so in a way 
that
does not break existing stuff, I'd personally have no objections to 
putting
this in.

--Zem
--------------------------------------------------------------
Ziemowit Laski                 1 Infinite Loop, MS 301-2K
Mac OS X Compiler Group        Cupertino, CA USA  95014-2083
Apple Computer, Inc.           +1.408.974.6229  Fax .5477