Struct icu_timezone::MetazoneCalculator

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pub struct MetazoneCalculator {
    pub(crate) metazone_period: DataPayload<MetazonePeriodV1Marker>,
}
Expand description

MetazoneCalculator uses data from the data provider to calculate metazone id.

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§metazone_period: DataPayload<MetazonePeriodV1Marker>

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impl MetazoneCalculator

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pub const fn new() -> Self

Constructs a MetazoneCalculator using compiled data.

Enabled with the compiled_data Cargo feature.

📚 Help choosing a constructor

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pub fn try_new_with_any_provider( provider: &(impl AnyProvider + ?Sized), ) -> Result<Self, TimeZoneError>

A version of Self::new that uses custom data provided by an AnyProvider.

📚 Help choosing a constructor

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pub fn try_new_unstable( provider: &(impl DataProvider<MetazonePeriodV1Marker> + ?Sized), ) -> Result<Self, TimeZoneError>

A version of Self::new that uses custom data provided by a DataProvider.

📚 Help choosing a constructor

⚠️ The bounds on provider may change over time, including in SemVer minor releases.
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pub fn compute_metazone_from_time_zone( &self, time_zone_id: TimeZoneBcp47Id, local_datetime: &DateTime<Iso>, ) -> Option<MetazoneId>

Calculate metazone id from timezone id and local datetime.

§Examples
use icu::calendar::DateTime;
use icu::timezone::provider::{MetazoneId, TimeZoneBcp47Id};
use icu::timezone::MetazoneCalculator;
use tinystr::tinystr;

let mzc = MetazoneCalculator::new();

assert_eq!(
    mzc.compute_metazone_from_time_zone(
        TimeZoneBcp47Id(tinystr!(8, "gugum")),
        &DateTime::try_new_iso_datetime(1969, 1, 1, 0, 0, 0).unwrap()
    ),
    None
);

assert_eq!(
    mzc.compute_metazone_from_time_zone(
        TimeZoneBcp47Id(tinystr!(8, "gugum")),
        &DateTime::try_new_iso_datetime(1970, 1, 1, 0, 0, 0).unwrap()
    ),
    Some(MetazoneId(tinystr!(4, "guam")))
);

assert_eq!(
    mzc.compute_metazone_from_time_zone(
        TimeZoneBcp47Id(tinystr!(8, "gugum")),
        &DateTime::try_new_iso_datetime(1975, 1, 1, 0, 0, 0).unwrap()
    ),
    Some(MetazoneId(tinystr!(4, "guam")))
);

assert_eq!(
    mzc.compute_metazone_from_time_zone(
        TimeZoneBcp47Id(tinystr!(8, "gugum")),
        &DateTime::try_new_iso_datetime(2000, 12, 22, 15, 0, 0).unwrap()
    ),
    Some(MetazoneId(tinystr!(4, "cham")))
);

Trait Implementations§

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impl Debug for MetazoneCalculator

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

Formats the value using the given formatter. Read more
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impl Default for MetazoneCalculator

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T