> In four words: Fragile Base Class Problem. > > The problem is that a subclass (in 32 bit OS X) needs to know the size of the > superclass so it know how to lay out its ivars. If there is no explicit > ivars, there is no way for the compiler to know the size (since when it is > compiling the subclass it doesn't see all the files that may potentially > contain the parent's ivars).
Think of it like the compiler generates the ivars from the property definitions. So the ivar would be indeed explicit ivars - just not defined as such in the classic way. _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
