Module chronoutil::delta

Contains utility functions for shifting Date objects.

Functions

• is_leap_year
  Returns true if the year is a leap-year, as naively defined in the Gregorian calendar.
• shift_months
  Shift a date by the given number of months. Ambiguous month-ends are shifted backwards as necessary.
• shift_months_opt
  Same as shift_months except fallible on unresolvable dates/times.
• shift_years
  Shift a date by the given number of years. Ambiguous month-ends are shifted backwards as necessary.
• shift_years_opt
  Same as shift_years except fallible on unresolvable dates/times.
• with_day
  Shift the date to have the given day. Returns None if the day is not in the range 1-31.
• with_month
  Shift the date to have the given month. Returns None if the month is out of range.
• with_month_opt
  Similar to with_month except also fallible on unresolvable dates/times.
• with_year
  Shift the date to have the given year.
• with_year_opt
  Same as with_year except fallible on unresolvable dates/times.