Is it possible to put a tuple in an enum using Swift?
If I have the following enum:
enum FruitTuple
{
static let Apple = (shape:"round",colour:"red")
static let Orange = (shape:"round",colour:"orange")
static let Banana = (shape:"long",colour:"yellow")
}
Then I have the following function:
static func PrintFruit(fruit:FruitTuple)
{
let shape:String = fruit.shape
let colour:String = fruit.colour
print("Fruit is \(shape) and \(colour)")
}
Q fruit.shape
and fruit.colour
I get the error:
Value of type 'FruitTuple' has no member 'shape'
Honest enough, so I modify the enum to be of type:
enum FruitTuple:(shape:String, colour:String)
{
static let Apple = (shape:"round",colour:"red")
static let Orange = (shape:"round",colour:"orange")
static let Banana = (shape:"long",colour:"yellow")
}
But then in the enum declaration I get the error:
Inheritance from non-named type '(shape: String, colour: String)'
So the question is, is it possible to have a tuple in an enum and be able to refer to its constituent parts in this way? Am I just missing something fundamental here?
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As @MartinR pointed out. In addition, according to Apple docs, "enumeration cases can specify associated values of any type to be stored along with each value of each case." If you want to keep using enum
, you might need to do something like:
static func PrintFruit(fruit:FruitTuple.Apple)
{
let shape:String = fruit.shape
let colour:String = fruit.colour
print("Fruit is \(shape) and \(colour)")
}
I'm not sure what you want, but I think using typealias
might help you achieve your goal.
typealias FruitTuple = (shape: String, colour: String)
enum Fruit
{
static let apple = FruitTuple("round" , "red")
static let orange = FruitTuple("round", "orange")
static let banana = FruitTuple("long", "yellow")
}
func printFruit(fruitTuple: FruitTuple)
{
let shape:String = fruitTuple.shape
let colour:String = fruitTuple.colour
}
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