优化了本地定时器+下次的判断

error.go

@@ -0,0 +1,25 @@
+package timerx
+
+import "errors"
+
+var (
+	ErrTimerNotFound = errors.New("timer not found")
+	// 任务ID不能为空
+	ErrTaskIdEmpty = errors.New("taskId can not be empty")
+	// 每月的天数必须在0-31之间
+	ErrMonthDay = errors.New("month day must be between 0 and 31")
+	// 小时必须在0-23之间
+	ErrHour = errors.New("hour must be between 0 and 23")
+	// 分钟必须在0-59之间
+	ErrMinute = errors.New("minute must be between 0 and 59")
+	// 秒必须在0-59之间
+	ErrSecond = errors.New("second must be between 0 and 59")
+	// 回调函数不能为空
+	ErrCallbackEmpty = errors.New("callback can not be empty")
+	// 星期必须在0-6之间
+	ErrWeekday = errors.New("weekday must be between Sunday and Saturday")
+	// 创建时间不能为空
+	ErrCreateTime = errors.New("create time can not be empty")
+	// 间隔时间必须大于0
+	ErrIntervalTime = errors.New("interval time must be greater than 0")
+)