swift enum code example

Example 1: can you pass an enum as a parameter to a function swift

func justAnExample<T : RawRepresentable>(_ enumType: T.Type) where T.RawValue == Int {

  // Note that an explicit use of init is required when creating an instance from a
  // metatype. We're also using a guard, as `init?(rawValue:)` is failable.
  guard let val = enumType.init(rawValue: 0) else { return }
  print("description: \(val)")
}

justAnExample(Foo.self) // prints: "description: Hello Foo"
justAnExample(Bar.self) // prints: "description: Hello Bar"

Example 2: swift enum

enum Planet {
    case mercury, venus, earth, mars, jupiter, saturn, uranus, neptune
}

Example 3: enum raw value swift

enum numbers: Int {
 case one = 1, two, three, four
}

let num = numbers.one
print(num.rawValue) // Output: 1