Free functions in ChaiScript

freeFunctions.chai

def nextPlayer(player) {
    return ((player + 1) % 4)
}
// typed (optional)
def nextPlayer2(int player) {
    return ((player + 1) % 4)
}

def getPlayerPositionRelativeTo(refPlayer, targetPlayer) {
    if (refPlayer == targetPlayer) {
        return BottomPlayer
    }
    var diff = 0
    var curr = nextPlayer(refPlayer)
    ++diff
    while (curr != targetPlayer) {
        curr = nextPlayer(curr)
        ++diff
    }
    if (diff == 0) {
        return BottomPlayer
    }
    else if (diff == 1) {
        return LeftPlayer
    }
    else if (diff == 2) {
        return FrontPlayer
    }
    else if (diff == 3) {
        return RightPlayer
    }
    else {
        throw("Error calculating the player position. This is a bug")
    }
}