reflection1_9.go

type Foo struct {
	A int
}

func (f Foo) Double() int {
	return f.A * 2
}

type Bar struct {
	Foo
	B int
}

type Doubler interface {
	Double() int
}

func DoDouble(d Doubler) {
	fmt.Println(d.Double())
}

func main() {
	f := Foo{10}
	b := Bar{Foo: f, B: 20}
	DoDouble(f) // passed in an instance of Foo; it meets the interface, so no surprise here
	DoDouble(b) // passed in an instance of Bar; it works!
}