class XORBomb : XORDetonator, Explodes {

    override fun explode() {
        explode( (dir + 1) % 4 )
        explode( (dir + 3) % 4 )
        actor.die()
    }

    fun explode( direction : int ) {
        val item = look( direction ).item()
        if ( !(item is Empty) && !(item is Outside) && (item.actor != null) ) {
            item.actor.die()
        }
    }

}