Trait icu_calendar::Calendar

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pub trait Calendar {
    type DateInner: PartialEq + Eq + Clone + Debug;


Show 14 methods    // Required methods
    fn date_from_codes(
        &self,
        era: Era,
        year: i32,
        month_code: MonthCode,
        day: u8,
    ) -> Result<Self::DateInner, CalendarError>;
    fn date_from_iso(&self, iso: Date<Iso>) -> Self::DateInner;
    fn date_to_iso(&self, date: &Self::DateInner) -> Date<Iso>;
    fn months_in_year(&self, date: &Self::DateInner) -> u8;
    fn days_in_year(&self, date: &Self::DateInner) -> u16;
    fn days_in_month(&self, date: &Self::DateInner) -> u8;
    fn debug_name(&self) -> &'static str;
    fn year(&self, date: &Self::DateInner) -> FormattableYear;
    fn is_in_leap_year(&self, date: &Self::DateInner) -> bool;
    fn month(&self, date: &Self::DateInner) -> FormattableMonth;
    fn day_of_month(&self, date: &Self::DateInner) -> DayOfMonth;
    fn day_of_year_info(&self, date: &Self::DateInner) -> DayOfYearInfo;

    // Provided methods
    fn day_of_week(&self, date: &Self::DateInner) -> IsoWeekday { ... }
    fn any_calendar_kind(&self) -> Option<AnyCalendarKind> { ... }

}
Expand description

A calendar implementation

Only implementors of Calendar should care about these methods, in general users of these calendars should use the methods on Date instead.

Individual Calendar implementations may have inherent utility methods allowing for direct construction, etc.

For ICU4X 1.0, implementing this trait or calling methods directly is considered unstable and prone to change, especially for offset_date() and until().

Required Associated Types§

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type DateInner: PartialEq + Eq + Clone + Debug

The internal type used to represent dates

Required Methods§

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fn date_from_codes( &self, era: Era, year: i32, month_code: MonthCode, day: u8, ) -> Result<Self::DateInner, CalendarError>

Construct a date from era/month codes and fields

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fn date_from_iso(&self, iso: Date<Iso>) -> Self::DateInner

Construct the date from an ISO date

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fn date_to_iso(&self, date: &Self::DateInner) -> Date<Iso>

Obtain an ISO date from this date

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fn months_in_year(&self, date: &Self::DateInner) -> u8

Count the number of months in a given year, specified by providing a date from that year

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fn days_in_year(&self, date: &Self::DateInner) -> u16

Count the number of days in a given year, specified by providing a date from that year

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fn days_in_month(&self, date: &Self::DateInner) -> u8

Count the number of days in a given month, specified by providing a date from that year/month

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fn debug_name(&self) -> &'static str

Obtain a name for the calendar for debug printing

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fn year(&self, date: &Self::DateInner) -> FormattableYear

The calendar-specific year represented by date

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fn is_in_leap_year(&self, date: &Self::DateInner) -> bool

Calculate if a date is in a leap year

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fn month(&self, date: &Self::DateInner) -> FormattableMonth

The calendar-specific month represented by date

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fn day_of_month(&self, date: &Self::DateInner) -> DayOfMonth

The calendar-specific day-of-month represented by date

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fn day_of_year_info(&self, date: &Self::DateInner) -> DayOfYearInfo

Information of the day of the year

Provided Methods§

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fn day_of_week(&self, date: &Self::DateInner) -> IsoWeekday

Calculate the day of the week and return it

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fn any_calendar_kind(&self) -> Option<AnyCalendarKind>

The AnyCalendarKind corresponding to this calendar, if one exists. Implementors outside of icu::calendar should return None

Object Safety§

This trait is not object safe.

Implementors§