我正在尝试从枚举的reflect.Type和值 https://play.golang.org/p/PqklMe_Z4WX 创建一个enum实例

package main
import (
    "fmt"
    "reflect"
type WeekDay string
const (
    SUNDAY WeekDay = "sunday"
    MONDAY WeekDay = "monday"
func (day WeekDay) WeekDay() bool {
    switch day {
    case SUNDAY, MONDAY:
        return true
    default:
        return false
func main() {
    rt := reflect.TypeOf(WeekDay("sunday"))
    x := reflect.New(rt)
    x = x.Elem()
    x.Set(reflect.ValueOf("sunday"))
    fmt.Println(x.Interface())
}

有没有办法在golang中创建一个enum的实例，它的类型和可能的常量值？