On May 29, 2016, at 22:31 , Ken Thomases <[email protected]> wrote: > > I think the documentation for SubstringNotRequired is sufficient design > contract: > > "NSStringEnumerationSubstringNotRequired > "A way to indicate that the block does not need substring, in which case nil > will be passed. This is simply a performance shortcut."
This contract is of the form “if A then B”, from which it is NOT generally valid to conclude “if not-A then not-B”. Plausibly, you can read a hidden “only” into the documentation, but I’d still suggest not relying on it, since it seems unnecessary. _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
