Swift enum all values - The.Swift.Dev.

From Swift 4.2 you’ll be able to merely conform to the CaseIterable protocol, and you will get the allCases static property without cost. If you’re studying this weblog publish in 2020, you need to positively improve your Swift language model to the newest. 🎉🎉🎉

enum ABC: String, CaseIterable 
    case a, b, c


print(ABC.allCases.map  $0.rawValue )

If you’re focusing on beneath Swift 4.2, be happy to make use of the following method.

The EnumCollection protocol strategy

First we have to outline a brand new EnumCollection protocol, after which we’ll make a protocol extension on it, so you do not have to put in writing an excessive amount of code in any respect.

public protocol EnumCollection: Hashable 
    static func circumstances() -> AnySequence<Self>
    static var allValues: [Self]  get 


public extension EnumCollection {

    public static func circumstances() -> AnySequence<Self> {
        return AnySequence  () -> AnyIterator<Self> in
            var uncooked = 0
            return AnyIterator 
                let present: Self = withUnsafePointer(to: &uncooked)  $0.withMemoryRebound(to: self, capability: 1)  $0.pointee  
                guard present.hashValue == uncooked else 
                    return nil
                
                uncooked += 1
                return present
            
        
    }

    public static var allValues: [Self] 
        return Array(self.circumstances())
    
}

Any further you solely have to evolve your enum sorts to the EnumCollection protocol and you may benefit from the model new circumstances methodology and allValues property which can include all of the doable values for that given enumeration.

enum Weekdays: String, EnumCollection 
    case sunday, monday, tuesday, wednesday, thursday, friday, saturday


for weekday in Weekdays.circumstances() 
    print(weekday.rawValue)


print(Weekdays.allValues.map  $0.rawValue.capitalized )

Notice that the bottom sort of the enumeration must be Hashable, however that is not an enormous deal. Nonetheless this resolution appears like previous tense, similar to Swift 4, please think about upgrading your venture to Swift 5. Thanks for studying, bye! 👋

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