golang实现面向对象抽象方法

我们知道golang没有类的概念，只有结构体，也就是组合的思想，所以没有java的继承。如果我们想要使用golang实现继承，直接看代码

type BaseIntf interface {
	handle(str string)
}

type Base struct {
	sendMsg func(string) string
}

func newBase() *Base {
	base := &Base{}
	base.sendMsg = base.sendMsg1
	return base
}

func (b *Base) handle(str string) {
	fmt.Printf("base handle function, str:%q\n", str)
	b.sendMsg(str)
}

func (b *Base) sendMsg1(msg string) string {
	fmt.Printf("base sendMsg function, str:%q\n", msg)
	return msg
}

type BaseChild struct {
	*Base
}

func newBaseChild() *BaseChild {
	child := &BaseChild{
		Base: newBase(),
	}
	child.Base.sendMsg = child.sendMsg1
	return child
}

//func (b *BaseChild) handle(str string) {
//	fmt.Printf("child handle function, str:%q\n", str)
//	b.sendMsg(str)
//}

func (b *BaseChild) sendMsg1(msg string) string {
	fmt.Printf("child sendMsg function, str:%q\n", msg)
	return msg
}

func main() {
	h := newBaseChild()
	h.handle("test")
}