Struct icu_datetime::neo_marker::NeoTimeZoneSpecificMarker

#[non_exhaustive]
pub struct NeoTimeZoneSpecificMarker {
    pub length: NeoSkeletonLength,
}

“Central Daylight Time” ⇒ specific time zone, or raw offset if unavailable

Examples

In NeoFormatter:

use icu::calendar::{Date, Time};
use icu::timezone::{TimeZoneBcp47Id, TimeZoneInfo, UtcOffset, ZoneVariant};
use icu::datetime::neo::NeoFormatter;
use icu::datetime::neo_marker::NeoTimeZoneSpecificMarker;
use icu::datetime::neo_skeleton::NeoSkeletonLength;
use icu::locale::locale;
use tinystr::tinystr;
use writeable::assert_try_writeable_eq;

let fmt = NeoFormatter::<NeoTimeZoneSpecificMarker>::try_new(
    &locale!("en").into(),
   NeoTimeZoneSpecificMarker::with_length(NeoSkeletonLength::Long),
)
.unwrap();

// Time zone info for America/Chicago in the summer
let zone = TimeZoneInfo::from_id_and_offset(
    TimeZoneBcp47Id(tinystr!(8, "uschi")),
    UtcOffset::from_eighths_of_hour(-5 * 8),
)
.at_time((Date::try_new_iso(2022, 8, 29).unwrap(), Time::midnight()))
.with_zone_variant(ZoneVariant::daylight());

assert_try_writeable_eq!(
    fmt.convert_and_format(&zone),
   "Central Daylight Time"
);

In TypedNeoFormatter:

use icu::calendar::{Date, Time};
use icu::timezone::{CustomZonedDateTime, TimeZoneBcp47Id, TimeZoneInfo, UtcOffset, ZoneVariant};
use icu::calendar::Gregorian;
use icu::datetime::neo::TypedNeoFormatter;
use icu::datetime::neo_marker::NeoTimeZoneSpecificMarker;
use icu::datetime::neo_skeleton::NeoSkeletonLength;
use icu::locale::locale;
use tinystr::tinystr;
use writeable::assert_try_writeable_eq;

let fmt = TypedNeoFormatter::<Gregorian, NeoTimeZoneSpecificMarker>::try_new(
    &locale!("en").into(),
   NeoTimeZoneSpecificMarker::with_length(NeoSkeletonLength::Long),
)
.unwrap();

// Time zone info for America/Chicago in the summer
let zone = TimeZoneInfo::from_id_and_offset(
    TimeZoneBcp47Id(tinystr!(8, "uschi")),
    UtcOffset::from_eighths_of_hour(-5 * 8),
)
.at_time((Date::try_new_iso(2022, 8, 29).unwrap(), Time::midnight()))
.with_zone_variant(ZoneVariant::daylight());

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

When a display name is unavailable, falls back to the offset format:

use icu::calendar::{Date, Time};
use icu::timezone::{CustomZonedDateTime, TimeZoneBcp47Id, TimeZoneInfo, UtcOffset, ZoneVariant};
use icu::calendar::Gregorian;
use icu::datetime::neo::TypedNeoFormatter;
use icu::datetime::neo_marker::NeoTimeZoneSpecificMarker;
use icu::datetime::neo_skeleton::NeoSkeletonLength;
use icu::locale::locale;
use tinystr::tinystr;
use writeable::assert_try_writeable_eq;

let fmt = TypedNeoFormatter::<Gregorian, _>::try_new(
    &locale!("en").into(),
    NeoTimeZoneSpecificMarker::with_length(NeoSkeletonLength::Short),
)
.unwrap();

// Time zone info for America/Sao_Paulo in the winter
let zone = TimeZoneInfo::from_id_and_offset(
    TimeZoneBcp47Id(tinystr!(8, "brsao")),
    UtcOffset::from_eighths_of_hour(-3 * 8),
)
.at_time((Date::try_new_iso(2022, 1, 29).unwrap(), Time::midnight()))
.with_zone_variant(ZoneVariant::standard());

assert_try_writeable_eq!(
    fmt.format(&zone),
    "GMT-3"
);

Only a full time zone info can be formatted with this style. For example, AtTime cannot be formatted.

use icu::calendar::{DateTime, Iso};
use icu::datetime::neo::TypedNeoFormatter;
use icu::datetime::neo_marker::NeoTimeZoneSpecificMarker;
use icu::datetime::neo_skeleton::NeoSkeletonLength;
use icu::timezone::{TimeZoneBcp47Id, UtcOffset, ZoneVariant};
use tinystr::tinystr;
use icu::locale::locale;
use writeable::assert_try_writeable_eq;

let datetime = DateTime::try_new_gregorian(2024, 10, 18, 0, 0, 0).unwrap();
let utc_offset = UtcOffset::from_eighths_of_hour(-6 * 8);
let time_zone_basic = utc_offset.with_id(TimeZoneBcp47Id(tinystr!(8, "uschi")));
let time_zone_at_time = time_zone_basic.at_time((datetime.date.to_iso(), datetime.time));

let formatter = TypedNeoFormatter::try_new(
    &locale!("en-US").into(),
    NeoTimeZoneSpecificMarker::with_length(NeoSkeletonLength::Medium),
)
.unwrap();

// error[E0271]: type mismatch resolving `<AtTime as TimeZoneModel>::ZoneVariant == ZoneVariant`
// note: required by a bound in `TypedNeoFormatter::<C, FSet>::format`
formatter.format(&time_zone_at_time);

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

length: NeoSkeletonLength

The desired length of the formatted string.

See: NeoSkeletonLength

Implementations

impl NeoTimeZoneSpecificMarker

pub const fn with_length(length: NeoSkeletonLength) -> Self

Creates a NeoTimeZoneSpecificMarker skeleton with the given formatting length.

Trait Implementations

impl DateTimeMarkers for NeoTimeZoneSpecificMarker

type D = NeoNeverMarker

Associated types for date formatting.

type T = NeoNeverMarker

Associated types for time formatting.

type Z = NeoTimeZoneSpecificMarker

Associated types for time zone formatting.

type LengthOption = NeoSkeletonLength

Type of the length option in the constructor.

type AlignmentOption = ()

Type of the alignment option in the constructor.

type YearStyleOption = ()

Type of the year style option in the constructor.

type FractionalSecondDigitsOption = ()

Type of the fractional seconds display option in the constructor.

type GluePatternV1Marker = NeverMarker<GluePatternV1<'static>>

Marker for loading the date/time glue pattern.

impl Debug for NeoTimeZoneSpecificMarker

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

Formats the value using the given formatter.

impl GetField<()> for NeoTimeZoneSpecificMarker

fn get_field(&self)

Returns the value of this trait’s field T.

impl GetField<NeoSkeletonLength> for NeoTimeZoneSpecificMarker

fn get_field(&self) -> NeoSkeletonLength

Returns the value of this trait’s field T.

impl HasConstComponents for NeoTimeZoneSpecificMarker

const COMPONENTS: NeoComponents = _

The associated components.

impl HasConstZoneComponent for NeoTimeZoneSpecificMarker

const COMPONENT: NeoTimeZoneStyle = NeoTimeZoneStyle::Specific

The associated component.

impl ZoneMarkers for NeoTimeZoneSpecificMarker

type TimeZoneIdInput = TimeZoneBcp47Id

Marker for resolving the time zone id input field.

type TimeZoneOffsetInput = Option<UtcOffset>

Marker for resolving the time zone offset input field.

type TimeZoneVariantInput = ZoneVariant

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 EssentialsV1Marker = TimeZoneEssentialsV1Marker

Marker for loading core time zone data.

type LocationsV1Marker = NeverMarker<LocationsV1<'static>>

Marker for loading location names for time zone formatting

type GenericLongV1Marker = NeverMarker<MetazoneGenericNamesV1<'static>>

Marker for loading generic long time zone names.

type GenericShortV1Marker = NeverMarker<MetazoneGenericNamesV1<'static>>

Marker for loading generic short time zone names.

type SpecificLongV1Marker = MetazoneSpecificNamesLongV1Marker

Marker for loading specific long time zone names.

type SpecificShortV1Marker = MetazoneSpecificNamesShortV1Marker

Marker for loading generic short time zone names.

type MetazonePeriodV1Marker = MetazonePeriodV1Marker

Marker for loading metazone periods.

impl UnstableSealed for NeoTimeZoneSpecificMarker