在 go 中将枚举类型转换为 *枚举类型

Day*Mappings

var id = MON
*r = id

DayMappings*r

package main

type Day string

const (

    SUNDAY  Day = ""

    MONDAY  Day = "MONDAY"

    TUESDAY Day = "TUESDAY"

)

type Mappings string

const (

    SUN Mappings = ""

    MON Mappings = "MON"

    TUE Mappings = "TUE"

)

func main() {

    type A struct {

        day Day

    }

    type B struct {

        day *Mappings

    }

    sourceObj := A{day: MONDAY}

    destObj := B{}

    destObj.day.To(sourceObj.day)

}

func (r *Mappings) To(m Day) {

    switch m {

    case MONDAY:

        *r = MON

    case TUESDAY:

        *r = TUE

    }

}