Swift enums with labels

gistfile1.swift

enum Foo {
  // enums can have many values, and they can be labeled
  case Bar(
    barString: String,
    barInt: Int)
  // or unlabeled
  case Baz(
    String,
    Int)
}

// you must now use a label when creating a Foo.Bar
let barFoo = Foo.Bar(
  barString: "barString", 
  barInt: 32)
  
switch barFoo {
case .Bar(
  let barString,
  let barInt):
  // you don't need to label your variables when you capture them in a switch/case statement
  print("barString: \(barString), barInt: \(barInt)")
case .Baz(let bazTuple):
  // you can capture multiple values as a single tuple
  print("bazString: \(bazTuple.0), bazInt: \(bazTuple.1)")
}

// Foo.Baz still doesn't need a label
let bazFoo = Foo.Baz(
  "bazString",
  64)
  
switch bazFoo {
// you can label your variables when you capture them in a switch/case statement if you want
// they don't do anything, they exist only for clarity.
case .Bar(
  barString: let myBarString,
  barInt: let myBarInt):
  print("barString: \(myBarString), barInt: \(myBarInt)")
// the usual way to capture variables in a switch/case statement
case .Baz(
  let bazString,
  let bazInt):
  print("bazString: \(bazString), bazInt: \(bazInt)")
}