enumGames.groovy

class ThridPartyCoolApi {
    enum Number {
        one(1), two(2), three(3)

        int value

        Number(int value) {
            this.value = value
        }

        int getValue() {
            return value;
        }
    }

    static int plus(Number first, Number second) {
        first.value + second.value
    }
}

//so far so good:
assert ThridPartyCoolApi.plus(ThridPartyCoolApi.Number.one, ThridPartyCoolApi.Number.two) == 3

//guess what, number four also exists!
// I want the following to work:
assert ThridPartyCoolApi.plus(ThridPartyCoolApi.Number.four, ThridPartyCoolApi.Number.two) == 6