Struct icu_timezone::TimeZoneIdMapperWithFastCanonicalizationBorrowed

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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.

Implementations§

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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 mapper = mapper.as_borrowed();

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 mapper = mapper.as_borrowed();

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);