Enum HourCycle

#[non_exhaustive]
pub enum HourCycle {
    H12,
    H23,
    H11,
    H24,
}

A Unicode Hour Cycle Identifier defines the preferred time cycle. Specifying “hc” in a locale identifier overrides the default value specified by supplemental time data for the region.

The valid values are listed in LDML.

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.

H12

The typical 12-hour clock. Hours are numbered 1–12. Corresponds to ‘h’ in patterns.

H23

The 24-hour clock. Hour are numbered 0–23. Corresponds to ‘H’ in patterns.

H11

Variant of the 12-hour clock, sometimes used in Japan. Hours are numbered 0–11. Corresponds to ‘K’ in patterns.

H24

Variant of the 24-hour clock, not in common use. Hours are numbered 1–24. Corresponds to ‘k’ in patterns.

❗ This is not the typical 24-hour clock! See H23 above for the 24-hour clock used throughout most of the world.

Implementations

impl HourCycle

pub const fn as_str(&self) -> &'static str

A helper function for displaying as a &str.

Trait Implementations

impl Clone for HourCycle

fn clone(&self) -> HourCycle

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HourCycle

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

Formats the value using the given formatter.

impl From<HourCycle> for Value

fn from(input: HourCycle) -> Value

Converts to this type from the input type.

impl Hash for HourCycle

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 PartialEq for HourCycle

fn eq(&self, other: &HourCycle) -> 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 PreferenceKey for HourCycle

fn unicode_extension_key() -> Option<Key>

Retrieve unicode extension key corresponding to a given preference.

fn try_from_key_value( key: &Key, value: &Value, ) -> Result<Option<HourCycle>, PreferencesParseError>

Optional constructor of the given preference. It takes the unicode extension key and if the key matches it attemptes to construct the preference based on the given value. If the value is not a valid value for the given key, the constructor throws.

fn unicode_extension_value(&self) -> Option<Value>

Retrieve unicode extension value corresponding to the given instance of the preference.

impl TryFrom<&Value> for HourCycle

type Error = PreferencesParseError

The type returned in the event of a conversion error.

fn try_from( s: &Value, ) -> Result<HourCycle, <HourCycle as TryFrom<&Value>>::Error>

Performs the conversion.

impl Copy for HourCycle

impl Eq for HourCycle

impl StructuralPartialEq for HourCycle