Thank you very much for your response. I made the change in the gist <https://gist.github.com/hooman/2b74d9756976a43330c1acfcfba699f3>. This takes me back to the same error that forced my into duplication path:
“Cannot assign through subscript: ‘self’ is immutable” for the object case. The gist <https://gist.github.com/hooman/2b74d9756976a43330c1acfcfba699f3> is self contained if you want to compile it yourself. Is this some kind of bug or the expected behavior? > On Apr 29, 2016, at 5:28 PM, Dave Abrahams via swift-users > <swift-users@swift.org> wrote: > > > on Fri Apr 29 2016, Hooman Mehr <swift-users-AT-swift.org> wrote: > >> Hi, >> >> I am designing APIs that need to support both reference (class/object) and >> value >> types. I am running into restrictions of `mutating` keyword in my protocols >> and >> this is causing a lot of duplication of code. In order to understand what I >> mean >> please take a look at this gist. >> >> As you see, I have pairs of almost identical declarations: KeyValueStore vs >> KeyValueStoreObject, and AnyDictionaryStore vs AnyDictionaryStoreObject. This >> keeps rapidly growing as I am designing my APIs. Is there any sane way around >> this? > > protocol KeyValueStoreObject : class, KeyValueStore {} > protocol AnyDictionaryStoreObject : class, AnyDictionaryStore {} > > would probably work for you. > > HTH, > > -- > Dave > > _______________________________________________ > swift-users mailing list > swift-users@swift.org > https://lists.swift.org/mailman/listinfo/swift-users
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