关于Golang中匿名函数返回值的问题？

Question

我在一个函数中调用的其他函数，其他函数中包含了一个匿名函数，我想直接在匿名函数中返回err，不知道该怎么实现，希望大佬能指点一下，谢谢！

func (client *ClientLoginModel) register()  error {
    if len(client.ID) == 0 {
        log.InfoW("client register", "clientModel", client)
        client.GetInfo()
        
        api.RegisterClient(*client, func(json *ResponseJson){
            err := mapstructure.Decode(json.Data, client)
            if err != nil {
                log.ErrorW("client info parse error", "err", err)
                return err (我想把这个err返回到register中)
            } else {
                log.InfoW("client register success", "id", client.ID)
                log.InfoW("write config")

                configMaps := make(map[string]interface{})
                configMaps["id"] = client.ID
                configMaps["userID"] = client.UserID

                err := base.SetConfigs(configMaps)
                if err != nil {
                    log.ErrorW("write config error", "err", err)
                    return
                }

            }

        }, func(json *ResponseJson) {
            // 失败
            log.ErrorW("client register error", "err", json)
            return
        })
    }
}

Answer 1

你这代码怎么写得更js一样，看着头大。。。

func (client *ClientLoginModel) register() error {
    if len(client.ID) == 0 {
        log.InfoW("client register", "clientModel", client)
        client.GetInfo()

        var e error

        api.RegisterClient(*client, func(json *ResponseJson) {
            err := mapstructure.Decode(json.Data, client)
            if err != nil {
                e = err
                log.ErrorW("client info parse error", "err", err)
                return
            } else {
                log.InfoW("client register success", "id", client.ID)
                log.InfoW("write config")

                configMaps := make(map[string]interface{})
                configMaps["id"] = client.ID
                configMaps["userID"] = client.UserID

                err := base.SetConfigs(configMaps)
                if err != nil {
                    e = err
                    log.ErrorW("write config error", "err", err)
                    return
                }

            }

        }, func(json *ResponseJson) {
            // 失败
            log.ErrorW("client register error", "err", json)
            return
        })

        return e
    }
    return nil
}