Mixed expressions are treated as invalid.

[milinsoft]

Hi,

I tested library on the examples provided by official Quartz Scheduler documentation. and found bug.

The following line 0/5 14,18,3-39,52 * ? JAN,MAR,SEP MON-FRI 2002-2010 does not pass validation, as it contains mix of sequence and interval its minutes section.

Such mixes can occur in other fields sections as well.

I see two the most strait-forward solutions:

1. Split such parts into subparts and validate using existing regexes.
2. (more optimal), Update existing regexes allowing such mixes

example:

from quartz_cron_checker import validate_cron_string, QuartzCronChecker
c = QuartzCronChecker.from_cron_string("0/5 14,18,3-39,52 * ? JAN,MAR,SEP MON-FRI 2002-2010")
c.validate()