+1 Finally, let’s get it done
> On 4 Jul 2016, at 03:36, Gabriel Lanata via swift-evolution > <[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 > > <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] > https://lists.swift.org/mailman/listinfo/swift-evolution
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