On Wed, Aug 18, 2010 at 3:33 PM, Kyle Sluder <kyle.slu...@gmail.com> wrote: > On Wed, Aug 18, 2010 at 12:16 PM, Sherm Pendley <sherm.pend...@gmail.com> > wrote: >> Possibly, but even in that case it would still have to "return [[self >> retain] autorelease];" in order to fulfill its end of the memory >> management contract. > > This is incorrect. It's perfectly valid to just return self if you > aren't returning a +1 reference.
Not true. Consider this example, where -stringByReplacingOccurrencesOfString:withString: could reasonably take a shortcut and return self: NSString *foo = [[NSString alloc] initWithString:@"foo"]; NSString *bar = [foo stringByReplacingOccurrencesOfString:@"foo" withString:@"foo"]; [foo release]; The "[foo release]" is perfectly correct, but if -stringByReplacingOccurrencesOfString:withString: is implemented with a simple "return self;" then *both* foo and bar would be immediately released. Implementing it as "return [[self retain] autorelease]" prevents such problems. sherm-- -- Cocoa programming in Perl: http://www.camelbones.org _______________________________________________ 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
