import io:*

adt options {
    option0,
    option1
}

adt maybe_int {
    no_int,
    an_int: int
}

fun handle_possibility(it: maybe_int) {
    if (it == maybe_int::no_int())
        println("no int")
    /*if (it == maybe_int::an_int) {*/
    else {
        print("an int: ")
        println(it.an_int)
    }
}

fun give_maybe(give_it: bool): maybe_int {
    if (give_it)
        return maybe_int::an_int(7)
    return maybe_int::no_int()
}

fun can_pass(it: options): options {
    return it
}

fun main():int {
    var it: options = can_pass(options::option0())
    if (it == options::option0())
        println("nope")
    if (it == options::option1())
        println("option1")

    var possibility = give_maybe(false)
    handle_possibility(possibility)
    possibility = give_maybe(true)
    handle_possibility(possibility)
    return 0
}