//! Parsing, manipulating, and serializing Unicode Language and Locale Identifiers. //! //! This module is published as its own crate ([`icu_locale_core`](https://docs.rs/icu_locale_core/latest/icu_locale_core/)) //! and as part of the [`icu`](https://docs.rs/icu/latest/icu/) crate. See the latter for more details on the ICU4X project. //! //! The module provides algorithms for parsing a string into a well-formed language or locale identifier //! as defined by [`UTS #35: Unicode LDML 3. Unicode Language and Locale Identifiers`]. Additionally //! the module provides [`preferences`] interface for operations on locale preferences and conversions //! from and to locale unicode extensions. //! //! [`Locale`] is the most common structure to use for storing information about a language, //! script, region, variants and extensions. In almost all cases, this struct should be used as the //! base unit for all locale management operations. //! //! [`LanguageIdentifier`] is a strict subset of [`Locale`] which can be useful in a narrow range of //! cases where [`Unicode Extensions`] are not relevant. //! //! If in doubt, use [`Locale`]. //! //! # Examples //! //! ``` //! use icu::locale::Locale; //! use icu::locale::{ //! locale, //! subtags::{language, region}, //! }; //! //! let mut loc: Locale = locale!("en-US"); //! //! assert_eq!(loc.id.language, language!("en")); //! assert_eq!(loc.id.script, None); //! assert_eq!(loc.id.region, Some(region!("US"))); //! assert_eq!(loc.id.variants.len(), 0); //! //! loc.id.region = Some(region!("GB")); //! //! assert_eq!(loc, locale!("en-GB")); //! ``` //! //! For more details, see [`Locale`] and [`LanguageIdentifier`]. //! //! [`UTS #35: Unicode LDML 3. Unicode Language and Locale Identifiers`]: https://unicode.org/reports/tr35/tr35.html#Unicode_Language_and_Locale_Identifiers //! [`ICU4X`]: ../icu/index.html //! [`Unicode Extensions`]: extensions
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