Re: Objective-C++

[Mike Stump]

On Apr 26, 2005, at 5:35 PM, Lars Sonchocky-Helldorf wrote:
> > I'm pushing the Objective-C++ frontend into the FSF source tree on  
> > mainline.  In doing this, I'm also pushing various updates to the  
> > Objective-C language; fast dispatching, GC, a new warning or two,  
> > a way to get at C++ ctors/dtors from a ObjC method.  Most of these  
> > would require library work to be complete.
>
> Does GC here stand for Garbage Collection?

Yup.

> If so, how is it supposed to work (in contrast to retain/release/ 
> autorelease and the already possible Boehm GC)?

:-)

Carefully.  I'm not the expert in the feature.  You can use -fobjc-gc  
to see what it does.  Mainly, it does two things, generates write  
barriers and fleshes out _OBJC_IMAGE_INFO with information used by  
the runtime.  It also adds an attribute "objc_gc", and intercepts for  
ivar assignment, global assignment...  For more details, I'd refer  
you to the code.  I don't think we have a write-up on it.

I mention them, just in case someone here would like to flesh out the  
libobjc.