Type coercion via callback

coerce.ooc

import structs/Bag

coerce: func (s: String, cb: Func <T> (T)) {
    match s {
        case "true"  => cb(true)
        case "false" => cb(false)
        case "0"     => cb(0)
        case         => cb(s)
    }
}

extend Bag {
    coerceAdd: func (value: String) {
        coerce(value, |result|
            add(result)
        )
    }
}

main: func {
    b := Bag new()
    b coerceAdd("true")
    b coerceAdd("false")
    b coerceAdd("0")
    b coerceAdd("jabba the hut")

    for (i in 0..b size) {
        "At #{i}, a #{b getClass(i) name}" println()
    }
}