Struct icu_calendar::julian::Julian

pub struct Julian;

The Julian Calendar

The Julian calendar is a solar calendar that was used commonly historically, with twelve months.

This type can be used with Date or DateTime to represent dates in this calendar.

Era codes

This calendar supports two era codes: "bce", and "ce", corresponding to the BCE/BC and CE/AD eras

Month codes

This calendar supports 12 solar month codes ("M01" - "M12")

Implementations

impl Julian

pub fn new() -> Self

Construct a new Julian Calendar

pub(crate) const fn fixed_from_julian(date: ArithmeticDate<Julian>) -> RataDie

fn days_in_year_direct(year: i32) -> u16

Convenience function so we can call days_in_year without needing to construct a full ArithmeticDate

fn julian_from_fixed(date: RataDie) -> JulianDateInner

Trait Implementations

impl Calendar for Julian

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

The calendar-specific year represented by date Julian has the same era scheme as Gregorian

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

The calendar-specific month represented by date

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

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

type DateInner = JulianDateInner

The internal type used to represent dates

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

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

Construct the date from an ISO date

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

Obtain an ISO date from this date

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

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

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

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

Calculate the day of the week and return it

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

Calculate if a date is in a leap year

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

Information of the day of the year

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

Obtain a name for the calendar for debug printing

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

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

impl CalendarArithmetic for Julian

type YearInfo = ()

In case we plan to cache per-year data, this stores useful computational information for the current year as a field on ArithmeticDate

fn month_days(year: i32, month: u8, _data: ()) -> u8

fn months_for_every_year(_: i32, _data: ()) -> u8

fn is_leap_year(year: i32, _data: ()) -> bool

fn last_month_day_in_year(_year: i32, _data: ()) -> (u8, u8)

fn days_in_provided_year(year: i32, _data: ()) -> u16

Calculate the days in a given year Can be overridden with simpler implementations for solar calendars (typically, 366 in leap, 365 otherwise) Leave this as the default for lunar calendars

impl Clone for Julian

fn clone(&self) -> Julian

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Julian

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Julian

fn default() -> Julian

Returns the “default value” for a type.

impl Hash for Julian

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Julian

fn cmp(&self, other: &Julian) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for Julian

fn eq(&self, other: &Julian) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Julian

fn partial_cmp(&self, other: &Julian) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Julian

impl Eq for Julian

impl StructuralPartialEq for Julian