> On Jan 8, 2018, at 6:29 PM, Ben Cohen via swift-evolution > <swift-evolution@swift.org> wrote: > > There exists in the standard library a type `DictionaryLiteral` that deserves > naming re-consideration before we declare ABI Stability, because it’s > confusingly misnamed, being neither a Dictionary (it doesn’t provide > key-based lookup of values) nor a Literal. > > Instead, it’s just an immutable collection of key-value pairs you can create > _from_ a literal. > > I’m canvassing for opinions on what it ought to be called. Some suggestions > so far: > > - `AssociationCollection`: Following the term of art from some other > languages. Slightly obscure-sounding to developers not already familiar. Also > “association” and “associative” are confusingly similar, which brings back > the is-this-a-dictionary problem. > - `KeyValueCollection`: Problematic because key-value comes up in a totally > different context in Cocoa. > - `PairCollection`: “Pair” is kinda nondescript. > - Do nothing. It’s not so bad.
Agreed so far, and I'd like to add CollectionOfPairs to the list. Some more fun facts about this type: - Besides Dictionary, it's the only other type in the standard library that is expressible by a dictionary literal - Unlike Dictionary, it *does* maintain the order of its pairs - Unlike Dictionary (part 2), it *doesn't* require the first element of the pairs to be Hashable Nate > The old name can live on indefinitely via a typealias (which has no ABI > consequences, so could be retired at a later date once everyone has had > plenty of time to address the deprecation warnings). Removing it as not > carrying its weight (and instead using `[(Key,Value)]`, which is basically > what it’s a wrapper for) is probably off the table for source stability > reasons. > > Any further thoughts welcome. > > > > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution _______________________________________________ swift-evolution mailing list swift-evolution@swift.org https://lists.swift.org/mailman/listinfo/swift-evolution
