Expand description
Minimal cron-expression parser + recurring scheduler.
Accepts the classic 5-field syntax:
minute hour day-of-month month day-of-week
0-59 0-23 1-31 1-12 0-6 (Sunday=0)Per field we support:
* - every value in the field’s range
*/N - every Nth value (step from the field’s minimum)
a-b - inclusive range
a,b,c - explicit list (entries may be ranges or steps)
a - single literal value
Not supported (out of scope for the minimum-viable recipe): the
L/W/? extensions, named months/days, seconds field, and
step modifiers attached to ranges (1-10/2). If a workload needs
those, reach for a full-featured cron crate.
CronSchedule::next_after(epoch_seconds) returns the next firing
second on or after the input. CronScheduler ties a CronSchedule
to a base TimerWheel, re-arming the next deadline each time the
current one fires.
Structs§
- Cron
Schedule - Cron
Scheduler - Recurring scheduler glued to a base
TimerWheel. After each fire the scheduler computes the next deadline from the cron schedule and re-arms.