Enums and Aliases

Enums

Enums define named values:

enum DoorState { Open, Closed, Locked }

Comparing enum values

fun describe(state: DoorState) String {
    if state == DoorState.Open {
        return "open";
    }
    if state == DoorState.Locked {
        return "locked";
    }
    return "closed";
}

Aliases

Aliases rename existing types:

alias Score = Int;
alias MyState = DoorState;

Example

alias MyInt = Int;

fun main() MyInt {
    var x: MyInt = 42;
    return x;
}