go tag的用法

type User struct {
Name string `asong:"Username"`
Age uint16 `asong:"age"`
Password string `asong:"min=6,max=10"`
}
func getTag(u User) {
t := reflect.TypeOf(u)

for i := 0; i < t.NumField(); i++ {
  field := t.Field(i)
  tag := field.Tag.Get("asong")
  fmt.Println("get tag is ", tag)
}
}

func main()  {
u := User{
  Name: "asong",
  Age: 5,
  Password: "123456",
}
getTag(u)
}