Hi everyone,
In the process of familiarising myself with Encodable/Decodable protocols I was
trying to apply it to the Range struct in order to persist a Range in CoreData
records. However, I seem to hit the wall with it and keep getting errors. This
happens in the Xcode 9.0.1 playground, not sure which swift version is used if
it’s 4 or 3.x but anyways, I get “Ambiguous reference to member
‘encode(_:forKey:)’ on every encode/decode method calls.
extension Range {
enum CodingKeys : String, CodingKey {
case upperBound
case lowerBound
}
}
extension Range: Codable {
public func encode(to encoder: Encoder) throws {
var container = encoder.container(keyedBy: CodingKeys.self)
try container.encode(upperBound, forKey: .upperBound)
try container.encode(lowerBound, forKey: .lowerBound)
}
public init(from decoder: Decoder) throws {
let values = try decoder.container(keyedBy: CodingKeys.self)
self.upperBound = try values.decode(Bound.self, forKey: .upperBound)
self.lowerBound = try values.decode(Bound.self, forKey: .lowerBound)
}
}
How would one add Codable support to such a struct? I’m feeling it may require
a bit of “where” clauses in extension because of the Generic aspect of this
struct but I fail to make the compiler happy.
Any help appreciated.
Best regards,
Thierry
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