Go采坑记: Golang 空接口的小技巧应用

type download interface {
	Download(interface{})
}

type dl struct {
	t string
}

func (d dl) Download(a interface{}) {
	switch a.(type) {
	case string:
		v := a.(string)
		log.Println(v)
	case int:
		v := a.(int)
		log.Println(v * v)
	default:
	}

}

type pool struct {
	function interface{}
	flag     string
}

func (p *pool) RUN() {
	s := p.function.(download)
	s.Download("a")
	s.Download(1)
}

func main() {
	p := &pool{
		function: &dl{},
	}
	p.RUN()
}