Struct chrono::naive::internals::YearFlags

pub struct YearFlags(pub(super) u8);

Year flags (aka the dominical letter).

YearFlags are used as the last four bits of NaiveDate, Mdf and IsoWeek.

There are 14 possible classes of year in the Gregorian calendar: common and leap years starting with Monday through Sunday.

The YearFlags stores this information into 4 bits LWWW. L is the leap year flag, with 1 for the common year (this simplifies validating an ordinal in NaiveDate). WWW is a non-zero Weekday of the last day in the preceding year.

Tuple Fields

0: u8

Implementations

impl YearFlags

pub(super) const fn from_year_mod_400(year: i32) -> YearFlags

pub(super) const fn ndays(&self) -> u32

pub(super) const fn isoweek_delta(&self) -> u32

pub(super) const fn nisoweeks(&self) -> u32

Trait Implementations

impl Clone for YearFlags

fn clone(&self) -> YearFlags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for YearFlags

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

Formats the value using the given formatter.

impl Hash for YearFlags

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 PartialEq for YearFlags

fn eq(&self, other: &YearFlags) -> 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 Copy for YearFlags

impl Eq for YearFlags

impl StructuralPartialEq for YearFlags