type from_string Result repetition

[bobjoe12131]

I am writing a simple from_string for a type with the days of the week:

pub fn from_string(str: String) -> Result(DayOfWeek, Nil) {
  case str {
    "Monday" -> Ok(Monday)
    "Tuesday" -> Ok(Tuesday)
    "Wednesday" -> Ok(Wednesday)
    "Thursday" -> Ok(Thursday)
    "Friday" -> Ok(Friday)
    "Saturday" -> Ok(Saturday)
    "Sunday" -> Ok(Sunday)
    _ -> Error(Nil)
  }
}

The thing i am wondering about is the line of OK(...) Is this The way or is there another way?

Maybe i am just missing early returns.

Edit: made fn my actual usecase.

[giacomocavalieri]

Yeah this looks totally fine to me!