On Sep 21, 2016, at 17:05 , Gabriel Zachmann <z...@tu-clausthal.de> wrote: > > In other words, the compiler unifies the two occurrences of the two literals, > thus effectively storing only one literal?
Correct. > So what would be the proper way to do it? A global variable has a fixed, unique memory address, so you can do this: static int MyContext; // does not need to be extern, just defined at the top level scope of some file, usually the relevant class implementation .m file // type doesn’t matter, because the value is never used But you can take advantage of a C quirk and actually write this: static void* MyContext = &MyContext; This has the interesting property that MyContext == &MyContext, which means you don’t have to worry about remembering the “&" operator when passing or testing the “context” parameter. _______________________________________________ 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com