+1 since it makes it easy to get the number of possible enum values, but I thought I'd tell you: there's no "Wind" type in Pokémon. It's "Flying". On Sun, Jul 3, 2016 at 18:36 Gabriel Lanata via swift-evolution < swift-evolution@swift.org> 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 > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution > -- -Saagar Jha
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