dongyao5843 2018-09-17 08:09
浏览 208
已采纳

switch语句中的变量范围问题

I have a program that parses a log file and returns a slice of structs with populated data from the file.

Also I have written a function to add a struct item to the aforemetioned list.

But there is an error that says "Cannot use 'sf' (type *SegmentationFault) as type SegmentationFault" which stems from this function. How am I to solve this problem?

func (sfList *SegmentationFaultList) AddItem(item SegmentationFault) []SegmentationFault {
    sfList.Items = append(sfList.Items, item)
    return sfList.Items
}

func parseLogFile(logPath string) (s *SegmentationFaultList){
    logFile, err := os.Open(logPath)
    checkError(err, "Could not open your log file")
    defer logFile.Close()

    scanner := bufio.NewScanner(logFile)
    parsing := false
    sf := new(SegmentationFault)
    sfs := []SegmentationFault{}
    sfList := SegmentationFaultList{sfs}
    var beginRegexp = regexp.MustCompile(`(?i).+\[err\]:F-(\d+): Dump: Segmentation fault at ([\da-z]+)$`)
    var endRegexp = regexp.MustCompile(`(?i).+\[info\]:Engine child with pid \d+ terminated`)
    var sfTextRegexp = regexp.MustCompile(`(?i).+\[err\]:F-\d+: Dump:(.+)`)

    for scanner.Scan() {
        beginMatch := beginRegexp.FindStringSubmatch(scanner.Text())
        switch {
        case beginMatch != nil:
            sf.pid = beginMatch[1]
            sf.sfAt = beginMatch[2]
            parsing = true
        case endRegexp.FindStringSubmatch(scanner.Text()) != nil:
            parsing = false
            sfList.AddItem(sf)
        case parsing:
            sf.sfText = append(sf.sfText, strings.TrimSpace(sfTextRegexp.FindStringSubmatch(scanner.Text())[1]))
        }
    }
    if err := scanner.Err(); err != nil {
        log.Fatal(err)
    }
    return sfList
}
  • 写回答

1条回答 默认 最新

  • dst67283 2018-09-17 09:59
    关注

    Your problem is that you are passing a pointer value (*SegmentationFault) where you just want a value SegmentationFault.

    Instead of

    sf := new(SegmentationFault)
    

    You should do:

    sf := SegmentationFault{}
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

报告相同问题?

悬赏问题

  • ¥15 MATLAB怎么通过柱坐标变换画开口是圆形的旋转抛物面?
  • ¥15 寻一个支付宝扫码远程授权登录的软件助手app
  • ¥15 解riccati方程组
  • ¥15 display:none;样式在嵌套结构中的已设置了display样式的元素上不起作用?
  • ¥15 使用rabbitMQ 消息队列作为url源进行多线程爬取时,总有几个url没有处理的问题。
  • ¥15 Ubuntu在安装序列比对软件STAR时出现报错如何解决
  • ¥50 树莓派安卓APK系统签名
  • ¥65 汇编语言除法溢出问题
  • ¥15 Visual Studio问题
  • ¥20 求一个html代码,有偿