/**
 * rrule.ts, a pure RRULE reader for an honest, deliberately-bounded subset.
 *
 * The honesty rule (see the decision record): an event's recurrence is either
 * FULLY and correctly expanded, or NOT expanded at all with an explicit reason.
 * We never emit occurrences from a rule we do not completely honor, a half-honored
 * BYMONTHDAY would put events on wrong dates, which is worse than not expanding.
 *
 * Fully supported (expanded to real occurrences):
 *  - FREQ = DAILY | WEEKLY | MONTHLY | YEARLY
 *  - INTERVAL (default 1)
 *  - COUNT  (occurrence cap)
 *  - UNTIL  (inclusive end bound; DATE or date-time, 'Z' or floating)
 *  - BYDAY , ONLY for FREQ=WEEKLY with INTERVAL=1 and weekday-only tokens
 *             (MO,TU,WE,TH,FR,SA,SU with no leading ordinal). Under those
 *             conditions WKST does not change the matched set, so it is ignored
 *             safely. Any BYDAY outside that condition is treated as unsupported.
 *
 * Everything else present in the RRULE (BYMONTHDAY, BYMONTH, BYSETPOS, BYHOUR,
 * BYWEEKNO, BYYEARDAY, ordinal BYDAY, BYDAY on non-weekly, INTERVAL>1 with BYDAY,
 * or an unknown FREQ) marks the rule `unsupported` and names the offending part.
 *
 * PURE: no fs, no network, no process globals.
 */
import type { CalendarEvent, DateWindow, EventOccurrence, RecurrenceInfo } from './types.js';
/**
 * Classify a raw RRULE into an honest RecurrenceInfo. Called by the parser at read
 * time so the event carries its expansion verdict before any window is known.
 */
export declare function describeRecurrence(rule: string): RecurrenceInfo;
/**
 * Expand a (possibly recurring) event into concrete occurrences inside [window.from,
 * window.to] inclusive. A non-recurring event yields at most its single seed. An
 * event whose recurrence is `unsupported` yields ONLY its seed (if in-window),
 * flagged `isSeed`, never a fabricated series, the caller reads
 * `event.recurrence.expansion` to label it "recurrence not fully expanded".
 */
export declare function expandEvent(event: CalendarEvent, window: DateWindow): EventOccurrence[];
//# sourceMappingURL=rrule.d.ts.map