public override void ExitNumberedweekday(GoldenFoxLanguageParser.NumberedweekdayContext context) { var index = 0; if (context.numberedDay() != null) { index = context.numberedDay().INT().AsInt(); if (context.Last() != null) { index = 7 - index + 1; } index = index % 7; } var constraints = new List<IConstraint>(); while (Current.Constraints.Any()) { constraints.Add(Current.Constraints.Pop()); } while (Current.Timestamps.Any()) { var interval = new Weekday((DayOfWeek)index, Current.Timestamps.Pop()); interval.AddConstraints(constraints); _stack.Push(interval); } }