Struct CalendarSystem 

pub struct CalendarSystem { /* private fields */ }

A resolved calendar system, and the ICU data to compute in it.

Implementations

impl CalendarSystem

pub fn locale(&self) -> &str

The locale tag this system came from.

pub fn is_gregorian(&self) -> bool

Whether this is the plain Gregorian calendar, where every conversion is the identity and the arithmetic in crate::calendar already applies.

pub fn from_gregorian(&self, date: Date) -> (i32, u32, u32)

The (year, month, day) one Gregorian date has in this system.

pub fn to_gregorian(&self, year: i32, month: u32, day: u32) -> Option<Date>

The Gregorian date one (year, month, day) in this system names.

None when the triple does not exist – a 31st in a 30-day month, or a month this system’s year does not have.

pub fn days_in_month(&self, year: i32, month: u32) -> u32

Days in one month of this system.

pub fn months_in_year(&self, year: i32) -> u32

Months in one year of this system. Lunisolar years gain a leap month.

pub fn first_weekday(&self, year: i32, month: u32) -> usize

The weekday the 1st of this month falls on, Monday as 0 – the same convention as first_weekday_pub.

pub fn add_months(&self, year: i32, month: u32, delta: i32) -> (i32, u32)

The (year, month) delta months away in this system.

Years do not all hold twelve months – a lunisolar year gains a leap month – so this steps one month at a time rather than dividing, and asks the system how long each year it crosses actually is.

Trait Implementations

impl Clone for CalendarSystem

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.