Golang枚举示例之Day

package day

type Day uint

const (
    Sunday Day = iota
    Monday
    Tuseday
    Wednesday
    Thursday
    Friday
    Saturday
)

func (day Day) String() string {
    switch day {
    case Sunday:
        return "Sunday"
    case Monday:
        return "Monday"
    case Tuseday:
        return "Tuesday"
    case Wednesday:
        return "Wednesday"
    case Friday:
        return "Friday"
    case Saturday:
        return "Saturday"
    default:
        return "Invalid"
    }
}

package main

import "fmt"
import "day"

func main() {
    var today day.Day
    today = day.Sunday

    tomorrow := day.Monday

    fmt.Println("today:    ", today)
    fmt.Println("tomorrow: ", tomorrow)

    fmt.Printf("type of today:    %T\n", today)
    fmt.Printf("type of tomorrow: %T\n", tomorrow)
}