Accessing an Enumeration association value in Swift

Question

In this code I've written a really useless enum that defines a possible Number with Int or Float.

I can't understand how can I access the value that I set with the association. If I try to print it I get just (Enum Value)

enum Number {     case int (Int)     case float (Float) }  let integer = Number.int(10) let float = Number.float(10.5) println("integer is \(integer)") println("float is \(float)") 

Answer 1

For sake of completeness, enum's association value could be accesed also using if statement with pattern matching. Here is solution for original code:

enum Number {   case int (Int)   case float (Float) }  let integer = Number.int(10) let float = Number.float(10.5)  if case let .int(i) = integer {   print("integer is \(i)") } if case let .float(f) = float {   print("float is \(f)") } 

This solution is described in detail in: https://appventure.me/2015/10/17/advanced-practical-enum-examples/

Answer 2

The value is associated to an instance of the enumeration. Therefore, to access it without a switch, you need to make a getter and make it available explicitly. Something like below:

enum Number {     case int(Int)     case float(Float)      func get() -> NSNumber {         switch self {         case .int(let num):             return num         case .float(let num):             return num         }     } }  var vInteger = Number.int(10) var vFloat = Number.float(10.5)  println(vInteger.get()) println(vFloat.get()) 

Maybe in the future something like that may be automatically created or a shorter convenience could be added to the language.