Struct PackedEastAsianTraditionalYearData 

struct PackedEastAsianTraditionalYearData(u8, u8, u8);

The struct containing compiled ChineseData

Bit structure (little endian: note that shifts go in the opposite direction!)

Bit:             0   1   2   3   4   5   6   7
Byte 0:          [  month lengths .............
Byte 1:         .. month lengths ] | [ leap month index ..
Byte 2:          ] | [   NY offset       ] | unused

Where the New Year Offset is the offset from ISO Jan 19 of that year for Chinese New Year, the month lengths are stored as 1 = 30, 0 = 29 for each month including the leap month. The largest possible offset is 33, which requires 6 bits of storage.

🚧 This code is considered unstable; it may change at any time, in breaking or non-breaking ways, including in SemVer minor releases. While the serde representation of data structs is guaranteed to be stable, their Rust representation might not be. Use with caution.

Tuple Fields

0: u8

1: u8

2: u8

Implementations

impl PackedEastAsianTraditionalYearData

const fn earliest_ny(related_iso: i32) -> RataDie

The first day on which Chinese New Year may occur

According to Reingold & Dershowitz, ch 19.6, Chinese New Year occurs on Jan 21 - Feb 21 inclusive.

Our simple approximation sometimes returns Feb 22.

We allow it to occur as early as January 19 which is the earliest the second new moon could occur after the Winter Solstice if the solstice is pinned to December 20.

const fn new( related_iso: i32, month_lengths: [bool; 13], leap_month: Option<u8>, new_year: RataDie, ) -> Self

It clamps some values to avoid debug assertions on calendrical invariants.

fn new_year(self, related_iso: i32) -> RataDie

fn leap_month(self) -> Option<u8>

fn month_has_30_days(self, month: u8) -> bool

fn last_day_of_month(self, month: u8) -> u16

fn days_in_year(self) -> u16

Trait Implementations

impl Clone for PackedEastAsianTraditionalYearData

fn clone(&self) -> PackedEastAsianTraditionalYearData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PackedEastAsianTraditionalYearData

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

Formats the value using the given formatter.

impl Ord for PackedEastAsianTraditionalYearData

fn cmp(&self, other: &PackedEastAsianTraditionalYearData) -> 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,

Restrict a value to a certain interval.

impl PartialEq for PackedEastAsianTraditionalYearData

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for PackedEastAsianTraditionalYearData

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Copy for PackedEastAsianTraditionalYearData

impl Eq for PackedEastAsianTraditionalYearData

impl StructuralPartialEq for PackedEastAsianTraditionalYearData