Enum TimeZoneVariant

#[non_exhaustive]
#[repr(u8)]
pub enum TimeZoneVariant {
    Standard = 0,
    Daylight = 1,
}

A time zone variant, such as Standard Time, or Daylight/Summer Time.

This should not generally be constructed by client code. Instead, use

• TimeZoneVariant::from_rearguard_isdst
• TimeZoneInfo::infer_variant

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Standard = 0

The variant corresponding to "standard" in CLDR.

The semantics vary from time zone to time zone. The time zone display name of this variant may or may not be called “Standard Time”.

This is the variant with the lower UTC offset.

Daylight = 1

The variant corresponding to "daylight" in CLDR.

The semantics vary from time zone to time zone. The time zone display name of this variant may or may not be called “Daylight Time”.

This is the variant with the higher UTC offset.

Implementations

impl TimeZoneVariant

pub const fn from_rearguard_isdst(isdst: bool) -> TimeZoneVariant

Creates a zone variant from a TZDB isdst flag, if it is known that the TZDB was built with DATAFORM=rearguard.

If it is known that the database was not built with rearguard, a caller can try to adjust for the differences. This is a moving target, for example the known differences for 2025a are:

• Europe/Dublin since 1968-10-27
• Africa/Windhoek between 1994-03-20 and 2017-10-24
• Africa/Casablanca and Africa/El_Aaiun since 2018-10-28

If the TZDB build mode is unknown or variable, use TimeZoneInfo::infer_variant.

Trait Implementations

impl AsULE for TimeZoneVariant

type ULE = TimeZoneVariantULE

The ULE type corresponding to Self.

fn to_unaligned(self) -> <TimeZoneVariant as AsULE>::ULE

Converts from Self to Self::ULE.

fn from_unaligned(other: <TimeZoneVariant as AsULE>::ULE) -> TimeZoneVariant

Converts from Self::ULE to Self.

impl Clone for TimeZoneVariant

fn clone(&self) -> TimeZoneVariant

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for TimeZoneVariant

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for TimeZoneVariant

fn deserialize<__D>( __deserializer: __D, ) -> Result<TimeZoneVariant, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<O> GetField<TimeZoneVariant> for TimeZoneInfo<O>

where O: TimeZoneModel<TimeZoneVariant = TimeZoneVariant>,

fn get_field(&self) -> TimeZoneVariant

Returns the value of this trait’s field T.

impl<C, A, Z> GetField<TimeZoneVariant> for ZonedDateTime<A, Z>

where C: Calendar, A: AsCalendar<Calendar = C>, Z: GetField<TimeZoneVariant>,

fn get_field(&self) -> TimeZoneVariant

Returns the value of this trait’s field T.

impl Hash for TimeZoneVariant

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

where __H: Hasher,

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 IntoOption<TimeZoneVariant> for TimeZoneVariant

fn into_option(self) -> Option<TimeZoneVariant>

Return self as an Option<T>

impl Ord for TimeZoneVariant

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

fn eq(&self, other: &TimeZoneVariant) -> 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 TimeZoneVariant

fn partial_cmp(&self, other: &TimeZoneVariant) -> 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<'a> ZeroMapKV<'a> for TimeZoneVariant

type Container = ZeroVec<'a, TimeZoneVariant>

The container that can be used with this type: ZeroVec or VarZeroVec.

type Slice = ZeroSlice<TimeZoneVariant>

type GetType = TimeZoneVariantULE

The type produced by Container::get()

type OwnedType = TimeZoneVariant

The type produced by Container::replace() and Container::remove(), also used during deserialization. If Self is human readable serialized, deserializing to Self::OwnedType should produce the same value once passed through Self::owned_as_self()

impl Copy for TimeZoneVariant

impl Eq for TimeZoneVariant

impl StructuralPartialEq for TimeZoneVariant