用于返回布尔值的类型的Golang开关[关闭]

I've the following function which works OK, But I wonder if there is cleaner way to write it in Golang

the function get a flag and according to the value(string value) provide two Boolean response (and error)

func validate(flag string) (bool, bool, error) {
    switch true {
    case flag == "":
        return true, true, nil
    case flag == "types":
        return true, false, nil
    case flag == "ast":
        return false, true, nil
    }

    return false, false, errors.New("wrong order of arguments")
}

func validate(flag string) (bool, bool, error) {
    switch flag {
    case "":
        return true, true, nil
    case "types":
        return true, false, nil
    case "ast":
        return false, true, nil
    }

    return false, false, errors.New("wrong order of arguments")
}

Have a look at the docs for a fleshed out description of switch.