Struct SpecificLong

pub struct SpecificLong;

“Central Daylight Time” ⇒ time zone in specific non-location format, long length

Examples

use icu::datetime::input::Date;
use icu::datetime::input::{Time, TimeZone,TimeZoneInfo,  UtcOffset};
use icu::datetime::NoCalendarFormatter;
use icu::time::zone::TimeZoneVariant;
use icu::datetime::fieldsets::zone::SpecificLong;
use icu::locale::locale;
use tinystr::tinystr;
use writeable::assert_writeable_eq;

let fmt = NoCalendarFormatter::try_new(
    locale!("en").into(),
    SpecificLong
)
.unwrap();

// Time zone info for America/Chicago in the summer
let zone = TimeZone(tinystr!(8, "uschi"))
    .with_offset("-05".parse().ok())
    .at_time((Date::try_new_iso(2022, 8, 29).unwrap(), Time::midnight()))
    .with_zone_variant(TimeZoneVariant::Daylight);

assert_writeable_eq!(
    fmt.format(&zone),
    "Central Daylight Time"
);

When a display name is unavailable, falls back to the localized offset format for short lengths, and to the location format for long lengths:

use icu::datetime::input::Date;
use icu::datetime::input::{Time, TimeZone, TimeZoneInfo, UtcOffset};
use icu::calendar::Gregorian;
use icu::datetime::FixedCalendarDateTimeFormatter;
use icu::datetime::fieldsets::zone::{SpecificLong, SpecificShort};
use icu::locale::locale;
use icu::time::zone::TimeZoneVariant;
use tinystr::tinystr;
use writeable::assert_writeable_eq;

// Time zone info for Europe/Istanbul in the winter
let zone = TimeZone(tinystr!(8, "trist"))
    .with_offset("+02".parse().ok())
    .at_time((Date::try_new_iso(2022, 1, 29).unwrap(), Time::midnight()))
    .with_zone_variant(TimeZoneVariant::Standard);

let fmt = FixedCalendarDateTimeFormatter::<Gregorian, _>::try_new(
    locale!("en").into(),
    SpecificShort,
)
.unwrap();

assert_writeable_eq!(
    fmt.format(&zone),
    "GMT+2"
);

let fmt = FixedCalendarDateTimeFormatter::<Gregorian, _>::try_new(
    locale!("en").into(),
    SpecificLong,
)
.unwrap();

assert_writeable_eq!(
    fmt.format(&zone),
    "Türkiye Standard Time"
);

This style requires a TimeZoneVariant, so only a full time zone info can be formatted with this style. For example, TimeZoneInfo<AtTime> cannot be formatted.

use icu::datetime::input::{Date, Iso};
use icu::datetime::FixedCalendarDateTimeFormatter;
use icu::datetime::fieldsets::zone::SpecificLong;
use icu::locale::locale;
use icu::datetime::input::{DateTime, Time, TimeZone, UtcOffset};
use icu::time::zone::TimeZoneVariant;
use tinystr::tinystr;
use writeable::assert_writeable_eq;

let datetime = DateTime { date: Date::try_new_gregorian(2024, 10, 18).unwrap(), time: Time::midnight() };
let time_zone_basic = TimeZone(tinystr!(8, "uschi")).with_offset("-06".parse().ok());
let time_zone_at_time = time_zone_basic.at_time((datetime.date.to_iso(), datetime.time));

let formatter = FixedCalendarDateTimeFormatter::try_new(
    locale!("en-US").into(),
    SpecificLong,
)
.unwrap();

// error[E0271]: type mismatch resolving `<AtTime as TimeZoneModel>::TimeZoneVariant == TimeZoneVariant`
formatter.format(&time_zone_at_time);

Trait Implementations

impl Clone for SpecificLong

fn clone(&self) -> SpecificLong

Returns a copy of the value.

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

Performs copy-assignment from source.

impl DateTimeMarkers for SpecificLong

type D = ()

Associated types for date formatting.

type T = ()

Associated types for time formatting.

type Z = SpecificLong

Associated types for time zone formatting.

type GluePatternV1 = NeverMarker<GluePattern<'static>>

Marker for loading the date/time glue pattern.

impl DateTimeNamesMarker for SpecificLong

type YearNames = ()

type MonthNames = ()

type WeekdayNames = ()

type DayPeriodNames = ()

type ZoneEssentials = TimeZoneEssentialsV1

type ZoneLocations = LocationsV1

type ZoneLocationsRoot = LocationsRootV1

type ZoneExemplars = ()

type ZoneExemplarsRoot = ()

type ZoneGenericLong = ()

type ZoneGenericShort = ()

type ZoneStandardLong = MetazoneStandardNamesLongV1

type ZoneSpecificLong = MetazoneSpecificNamesLongV1

type ZoneSpecificShort = ()

type MetazoneLookup = MetazonePeriodV1

impl Debug for SpecificLong

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

Formats the value using the given formatter.

impl GetField<CompositeFieldSet> for SpecificLong

fn get_field(&self) -> CompositeFieldSet

Returns the value of this trait’s field T.

impl PartialEq for SpecificLong

fn eq(&self, other: &SpecificLong) -> 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 ZoneMarkers for SpecificLong

type TimeZoneIdInput = TimeZone

Marker for resolving the time zone id input field.

type TimeZoneOffsetInput = Option<UtcOffset>

Marker for resolving the time zone offset input field.

type TimeZoneVariantInput = TimeZoneVariant

Marker for resolving the time zone variant input field.

type TimeZoneLocalTimeInput = (Date<Iso>, Time)

Marker for resolving the time zone non-location display names, which depend on the datetime.

type EssentialsV1 = TimeZoneEssentialsV1

Marker for loading core time zone data.

type LocationsV1 = LocationsV1

Marker for loading location names for time zone formatting

type LocationsRootV1 = LocationsRootV1

Marker for loading location names for time zone formatting

type ExemplarCitiesV1 = NeverMarker<ExemplarCities<'static>>

Marker for loading exemplar city names for time zone formatting

type ExemplarCitiesRootV1 = NeverMarker<ExemplarCities<'static>>

Marker for loading exemplar city names for time zone formatting

type GenericLongV1 = NeverMarker<MetazoneGenericNames<'static>>

Marker for loading generic long time zone names.

type GenericShortV1 = NeverMarker<MetazoneGenericNames<'static>>

Marker for loading generic short time zone names.

type StandardLongV1 = MetazoneStandardNamesLongV1

Marker for loading standard long time zone names.

type SpecificLongV1 = MetazoneSpecificNamesLongV1

Marker for loading specific long time zone names.

type SpecificShortV1 = NeverMarker<MetazoneSpecificNames<'static>>

Marker for loading generic short time zone names.

type MetazonePeriodV1 = MetazonePeriodV1

Marker for loading metazone periods.

impl Copy for SpecificLong

impl Eq for SpecificLong

impl StructuralPartialEq for SpecificLong

impl UnstableSealed for SpecificLong