class IntFlag(var value: Int = 0) {
    fun set(f: FLAGS) { value = value or f.value }
    fun unset(f: FLAGS) { value = value and f.value.inv() }

    fun flagged() = FLAGS.values().filter { (value and it.value) != 0 }
}

enum class FLAGS(val value: Int) {
    FIRST(1), SECOND(2), THIRD(4), FOURTH(8) //Use whatever tags you need
}

object FlagHelper {
    val flag = IntFlag()
    fun apply_flags(init: Int = 0, actions: IntFlag.() -> Unit) = with(flag) {
        flag.value = init
        actions()
        value
    }
}