pub struct TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a> { /* private fields */ }
Expand description

A borrowed wrapper around the time zone ID mapper, returned by TimeZoneIdMapperWithFastCanonicalization::as_borrowed(). More efficient to query.

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impl TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>

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pub fn new() -> TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>

Creates a new TimeZoneIdMapperWithFastCanonicalizationBorrowed using compiled data.

See TimeZoneIdMapperWithFastCanonicalizationBorrowed for an example.

Enabled with the compiled_data Cargo feature.

📚 Help choosing a constructor

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pub fn static_to_owned( &self, ) -> TimeZoneIdMapperWithFastCanonicalization<TimeZoneIdMapper>

Cheaply converts a [TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>] into a TimeZoneIdMapperWithFastCanonicalization.

Note: Due to branching and indirection, using TimeZoneIdMapperWithFastCanonicalization might inhibit some compile-time optimizations that are possible with TimeZoneIdMapperWithFastCanonicalizationBorrowed.

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impl<'a> TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

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pub fn inner(&self) -> TimeZoneIdMapperBorrowed<'a>

Gets the inner TimeZoneIdMapperBorrowed for performing queries.

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pub fn canonicalize_iana( &self, iana_id: &str, ) -> Option<(&str, TimeZoneBcp47Id)>

Returns the canonical, normalized identifier of the given IANA time zone.

Also returns the BCP-47 time zone ID.

This is a faster version of TimeZoneIdMapperBorrowed::canonicalize_iana() and it always returns borrowed IANA strings, but it requires loading additional data (see TimeZoneIdMapperWithFastCanonicalization).

Returns None if the IANA ID is not found.

§Examples
use icu_timezone::TimeZoneBcp47Id;
use icu_timezone::TimeZoneIdMapperWithFastCanonicalization;
use std::borrow::Cow;

let mapper = TimeZoneIdMapperWithFastCanonicalization::new();

let result = mapper.canonicalize_iana("Asia/CALCUTTA").unwrap();

// The Cow is always returned borrowed:
assert_eq!(result.0, "Asia/Kolkata");
assert_eq!(*result.1, "inccu");

// Unknown IANA time zone ID:
assert_eq!(mapper.canonicalize_iana("America/San_Francisco"), None);
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pub fn canonical_iana_from_bcp47( &self, bcp47_id: TimeZoneBcp47Id, ) -> Option<&str>

Returns the canonical, normalized IANA ID of the given BCP-47 ID.

This is a faster version of TimeZoneIdMapperBorrowed::find_canonical_iana_from_bcp47() and it always returns borrowed IANA strings, but it requires loading additional data (see TimeZoneIdMapperWithFastCanonicalization).

Returns None if the BCP-47 ID is not found.

§Examples
use icu_timezone::TimeZoneBcp47Id;
use icu_timezone::TimeZoneIdMapperWithFastCanonicalization;
use std::borrow::Cow;
use tinystr::tinystr;

let mapper = TimeZoneIdMapperWithFastCanonicalization::new();

let bcp47_id = TimeZoneBcp47Id(tinystr!(8, "inccu"));
let result = mapper.canonical_iana_from_bcp47(bcp47_id).unwrap();

// The Cow is always returned borrowed:
assert_eq!(result, "Asia/Kolkata");

// Unknown BCP-47 time zone ID:
let bcp47_id = TimeZoneBcp47Id(tinystr!(8, "ussfo"));
assert_eq!(mapper.canonical_iana_from_bcp47(bcp47_id), None);

Trait Implementations§

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impl<'a> Clone for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

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fn clone(&self) -> TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'a> Debug for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

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

Formats the value using the given formatter. Read more
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impl Default for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>

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fn default() -> TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>

Returns the “default value” for a type. Read more
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impl<'a> Copy for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

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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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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
where T: Send + Sync,