Struct icu_timezone::TimeZoneIdMapperWithFastCanonicalizationBorrowed

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

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

Implementations

impl TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>

pub fn new() -> Self

Creates a new TimeZoneIdMapperWithFastCanonicalizationBorrowed using compiled data.

See TimeZoneIdMapperWithFastCanonicalizationBorrowed for an example.

✨ Enabled with the compiled_data Cargo feature.

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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.

impl<'a> TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

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

Gets the inner TimeZoneIdMapperBorrowed for performing queries.

pub fn canonicalize_iana( &self, iana_id: &str, ) -> Option<(TimeZoneIanaIdBorrowed<'_>, 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);

pub fn canonical_iana_from_bcp47( &self, bcp47_id: TimeZoneBcp47Id, ) -> Option<TimeZoneIanaIdBorrowed<'_>>

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);

pub fn iter_canonical_iana(&self) -> TimeZoneCanonicalIanaIter<'_>

Returns an iterator over all canonical IANA time zone identifiers in an arbitrary, unstable order.

To iterate over BCP-47 IDs, use TimeZoneIdMapperBorrowed::iter_bcp47().

Examples

use icu::timezone::TimeZoneIdMapperWithFastCanonicalization;

let ids = TimeZoneIdMapperWithFastCanonicalization::new()
    .iter_canonical_iana()
    .skip(30)
    .take(5)
    .map(|id| id.to_string())
    .collect::<Vec<_>>();

assert_eq!(
    ids,
    &[
        "America/Argentina/Ushuaia",
        "Pacific/Pago_Pago",
        "Europe/Vienna",
        "Australia/Adelaide",
        "Australia/Broken_Hill",
    ]
);

Trait Implementations

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>

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

Formats the value using the given formatter.

impl Default for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'static>

fn default() -> Self

Returns the “default value” for a type.

impl<'a> Copy for TimeZoneIdMapperWithFastCanonicalizationBorrowed<'a>