Function TimespanParser

src/natural-dates.test.ts:77–84

()

  }
  
  function* TimespanParser() {
    yield ['from', 'at', ''];
    yield whitespaceOptional;
    const startTime = yield TimeOfDayParser;
    yield whitespaceOptional;
    const endTime = yield optional(TimespanSuffixParser);
    return { startTime, endTime };
  }
  
  interface Result {
    weekdays: Set<Weekday>;