fg.go

type Car interface {
    Drive() string
}

type SportsCar struct{}

func (s SportsCar) Drive() string {
    return "Vroom vroom!"
}

type SUV struct{}

func (s SUV) Drive() string {
    return "Rumble rumble!"
}

func CarFactory(carType string) func() Car {
    if carType == "sports" {
        return func() Car { return SportsCar{} }
    } else if carType == "suv" {
        return func() Car { return SUV{} }
    }
    return nil
}