Golang语言断言

func funcName(a interface{}) string {

     return string(a)

}

func Test(a interface{}) string {

    value, ok := a.(string)

    if !ok {

        fmt.Println("It's not ok for type string",value)

        return

    }

    return value

}



func main(){

    a:="abcd"

    c1:=Test(a)

    b:=123

    c2:=Test(b)

    fmt.Println(c1,c2)

}