Crate icu_locale

source ·
Expand description

Canonicalization of locale identifiers based on CLDR data.

This module is published as its own crate (icu_locale) and as part of the icu crate. See the latter for more details on the ICU4X project.

It currently supports locale canonicalization based upon the canonicalization algorithm from UTS #35: Unicode LDML 3. LocaleId Canonicalization, as well as the minimize and maximize likely subtags algorithms as described in UTS #35: Unicode LDML 3. Likely Subtags.

The maximize method potentially updates a passed in locale in place depending up the results of running the ‘Add Likely Subtags’ algorithm from UTS #35: Unicode LDML 3. Likely Subtags.

This minimize method returns a new Locale that is the result of running the ‘Remove Likely Subtags’ algorithm from UTS #35: Unicode LDML 3. Likely Subtags.

§Examples

use icu::locale::Locale;
use icu::locale::{LocaleCanonicalizer, TransformResult};

let lc = LocaleCanonicalizer::new();

let mut locale: Locale = "ja-Latn-fonipa-hepburn-heploc"
    .parse()
    .expect("parse failed");
assert_eq!(lc.canonicalize(&mut locale), TransformResult::Modified);
assert_eq!(locale, "ja-Latn-alalc97-fonipa".parse::<Locale>().unwrap());
use icu::locale::{locale, LocaleExpander, TransformResult};

let lc = LocaleExpander::new();

let mut locale = locale!("zh-CN");
assert_eq!(lc.maximize(&mut locale.id), TransformResult::Modified);
assert_eq!(locale, locale!("zh-Hans-CN"));

let mut locale = locale!("zh-Hant-TW");
assert_eq!(lc.maximize(&mut locale.id), TransformResult::Unmodified);
assert_eq!(locale, locale!("zh-Hant-TW"));
use icu::locale::{locale, LocaleExpander, TransformResult};
use writeable::assert_writeable_eq;

let lc = LocaleExpander::new();

let mut locale = locale!("zh-Hans-CN");
assert_eq!(lc.minimize(&mut locale.id), TransformResult::Modified);
assert_eq!(locale, locale!("zh"));

let mut locale = locale!("zh");
assert_eq!(lc.minimize(&mut locale.id), TransformResult::Unmodified);
assert_eq!(locale, locale!("zh"));

Modules§

  • exemplar_chars
    This module provides APIs for getting exemplar characters for a locale.
  • extensions
    Unicode Extensions provide a mechanism to extend the LanguageIdentifier with additional bits of information - a combination of a LanguageIdentifier and Extensions is called Locale.
  • fallback
    Tools for locale fallback, enabling arbitrary input locales to be mapped into the nearest locale with data.
  • preferences
    This API provides necessary functionality for building user preferences structs.
  • provider
    🚧 [Unstable] Data provider struct definitions for this ICU4X component.
  • subtags
    Language Identifier and Locale contains a set of subtags which represent different fields of the structure.
  • zerovec
    Documentation on zero-copy deserialization of locale types.

Macros§

Structs§

Enums§