> Is there any other elegant way to achieve the desired behavior without > using `if-let + typecasting`?
One way is to use classes instead on structs and define display as a method on those classes. I’m no Swift expert but I expect you may find value in making display() into a protocol. Andrew _______________________________________________ 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