Swift enum cases with same name [duplicate]

Question

Let's say I have the following enum:

enum Measurement {
 case Volume(litre: Double)
 case Volume(millilitre: Double)
 case Length(cm: Double)
}

Then when I do a switch statement like so:

switch measurement {
 case .Volume(let val):
...   

How can I differentiate between the two Volume cases? Or is this really impossible, and I should have VolumeLitre & VolumeMillilitre instead?

Answer 1

You could create another enum that represent the volume:

enum Volume {
    case litre(Double)
    case millilitre(Double)
}

enum Measurement {
    case volume(Volume)
    case length(cm: Double)
} 

Also, for enum cases, use lowercase