Could a method return a pointer with return type of this method is value

Question

I saw a piece of code as below:

Just wondering as the value method of draw() have been implemented, why could it return the pointer of the struct in fact.

type Shape interface {
    draw()
}

type Rectangle struct {
}

func (Rectangle) draw() {
    fmt.Println("Draw Rectangle")
}

type Square struct {
}

func (Squre) draw() {
    fmt.Println("Draw Square")
}

type Circle struct {
}

func (Circle) draw() {
    fmt.Println("Draw Circle")
}


type ShapeFactory struct {
}

func (*ShapeFactory) CreateShape(shape string) Shape {
    if shape == "Rectangle" {
        return &Rectangle{}
    } else if shape == "Square" {
        return &Square{}
    } else if shape == "Circle" {
        return &Circle{}
    }
    return nil

}

I think should it be like below to implement a pointer method so that the method CreateShape could return the pointer of struct?

type Rectangle struct {
}

func (*Rectangle) draw() {
    fmt.Println("Draw Rectangle")
}

Answer 1

The return type defined on the CreateShape method is not a struct but an interface. Therefore CreateShape can return any type as long as it implements the Shape interface.