> Don't do that. object_getInstanceVariable() and object_setInstanceVariable() > still assume the ivar is of an object pointer type.
As the documentation and prototypes stand, one would think that object_getInstanceVariable() could be used like this: double *doublePointer = nil; object_getInstanceVariable(..., (void **)&doublePointer); NSLog(@"%f", *doublePointer); // get ivar value *doublePointer = 42.4242; // set ivar value (erroneously bypassing potential GC write barriers if it were a pointer type) ... especially since outValue is documented as "On return, contains a pointer to the value of the instance variable." In fact, I suppose it should read "On return, contains the value of a pointer-typed instance variable." Furthermore, if object_getInstanceVariable() assumes an "object pointer type" -- emphasis on _object_ -- shouldn't outValue be typed {id *}? _______________________________________________ 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