According to the document of Swift 3, Array has already conformed protocol RangeReplaceableCollection.
Zhaoxin On Wed, Jul 6, 2016 at 7:09 PM, Tim Vermeulen via swift-users < swift-users@swift.org> wrote: > RangeReplaceableCollection has three initialisers: init(), init(_:) and > init(repeating:count:). The latter two are implemented using the empty > initialiser. But why are these initialisers part of this particular > protocol? As far as I can tell, no other methods of this protocol depend on > these initialisers. The requirement of the empty initialiser makes it > impossible to have a collection conform to this protocol that needs > additional data for its initialisation. > > For instance, I was making an array that works with any Strideable > indices, not just integers. A startIndex is needed for its initialisation, > so I can’t really conform it to RangeReplaceableCollection. If I do it > anyways (with a fatalError() in the required empty initialiser) everything > seems to work just fine, except for the protocol’s three initialisers. > > Perhaps these initialisers should be moved to a (possible new) different > protocol? > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users >
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