On 05.07.2016 13:33, James Campbell via swift-evolution wrote:
Would love a real life scenario of why you would need this.
Some kind of pre-initialization(for GUI as example) for all possible kinds of values, that you should process then (for GUI - let's say add to needed list).
*___________________________________* *James⎥Head of Trolls* *[email protected] <mailto:[email protected]>⎥supmenow.com <http://supmenow.com>* *Sup* *Runway East * *10 Finsbury Square* *London* * EC2A 1AF * On 4 July 2016 at 02:36, Gabriel Lanata via swift-evolution <[email protected] <mailto:[email protected]>> wrote: Hello, this has been proposed multiple times before in different ways. Link to detailed proposal draft: https://github.com/gabriellanata/swift-evolution/blob/master/proposals/NNNN-allow-enumerating-cases-in-enumerations.md It is currently not possible to enumerate through all the possible cases of an enumeration object without adding a hardcoded value or recurring to unsafe workarounds. The proposal is to add a method of obtaining an array or set of all the possible cases natively for enumerations without associated values. The proposed solution is to implement a native `.cases` static var for all enumerations without associated values. This would provide a strict type-safe way of enumerating though the possible cases without risking runtime errors. The resulting code is a lot cleaner and less prone to errors caused by forgetting to update the hardcoded values when modifying cases. Resulting code: enum PokemonType { case Fire, Grass, Water, Wind } for pokemonType in PokemonType.cases { // Do stuff } PokemonType.cases.count // Returns 4 ------- Gabriel _______________________________________________ swift-evolution mailing list [email protected] <mailto:[email protected]> https://lists.swift.org/mailman/listinfo/swift-evolution _______________________________________________ swift-evolution mailing list [email protected] https://lists.swift.org/mailman/listinfo/swift-evolution
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