exclusive_enums.go

exclusive_enums.go

package main

type dessert int

const (
  ICE_CREAM dessert = iota
  CUP_CAKES
  GUMMY_WORMS
)

type exclusive_dessert interface {
  ignore_me()
}

func (d dessert) ignore_me() {}

// now use exclusive_dessert
func use_dessert(d exclusive_dessert) {}

// use_dessert(0) doesn't work!
// must use use_dessert(ICE_CREAM)

Perhaps implementing fmt.Sringer interface helps with formatting for better logs. Explored it a little bit on playground. It still has some limitations, specially inside structs.

func (d dessert) String() string {
	switch d {
	case ICE_CREAM:
		return "ice cream"
	case CUP_CAKES:
		return "cup cakes"
	case GUMMY_WORMS:
		return "gummy worms"
	default:
		return strconv.Itoa(int(d))
	}
}