[swift-evolution] Feedback on SE-0166 and SE-0167

[Gwendal Roué]

> Le 27 mai 2017 à 11:59, David Hart <david at hartbit.com> a écrit :
> 
> I didn’t know that was possible either! Really cool. Even better:
> 
>  if let databaseValueType = T.self as? DatabaseValueConvertible.Type {
>      let databaseValue: DatabaseValue = row.value(named: key.stringValue)
>      return databaseValueType.fromDatabaseValue(databaseValue) as! T
>  } else { … }


Yes, that's even more clear like that :-)

And for Encodable support, it works just great (not a single line of boilerplate code):

    private enum Color: String, DatabaseValueConvertible, Encodable {
        case red, green, blue
    }
    
    private struct EncodableStruct : Persistable, Encodable {
        static let databaseTableName = "myTable"
        let name: String
        let color: Color?
    }
    
    try dbQueue.inDatabase { db in
        try EncodableStruct(name: "Arthur", color: .red).insert(db)
    }

Gwendal

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