interfaces_code_snippet_21.go

type persona interface {
	strength() int
	intelligence() int
	stamina() int
}

type dwarf struct {}
func (d *dwarf) strength() int { return 80 }
func (d *dwarf) intelligence() int { return 55 }
func (d *dwarf) stamina() int { return 90 }

type wizard struct {}
func (w *wizard) strength() int { return 50 }
func (w *wizard) intelligence() int { return 90 }
func (w *wizard) stamina() int { return 60 }

type player struct {
	persona
}

func main() {
	p := player{&wizard{}}
	fmt.Println(p.intelligence()) // Prints 90.
}