Expand description
Parsing, manipulating, and serializing Unicode Language and Locale Identifiers.
This module is published as its own crate (icu_locid
)
and as part of the 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
.
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::locid::subtags::{Language, Region};
use icu::locid::Locale;
let mut loc: Locale = "en-US".parse().expect("Parsing failed.");
let lang: Language = "en".parse().expect("Parsing failed.");
let region: Region = "US".parse().expect("Parsing failed.");
assert_eq!(loc.id.language, lang);
assert_eq!(loc.id.script, None);
assert_eq!(loc.id.region, Some(region));
assert_eq!(loc.id.variants.len(), 0);
let region: Region = "GB".parse().expect("Parsing failed.");
loc.id.region = Some(region);
assert_eq!(loc.to_string(), "en-GB");
Macros
use icu::locid::{
langid, subtags_language as language, subtags_region as region,
};
let lid = langid!("EN_US");
assert_eq!(lid.language, language!("en"));
assert_eq!(lid.region, Some(region!("US")));
For more details, see Locale
and LanguageIdentifier
.
Modules
LanguageIdentifier
with
additional bits of information - a combination of a LanguageIdentifier
and Extensions
is called Locale
.Macros
Subtag
subtags.Subtag
subtags.Key
subtags.Attribute
subtags.Key
subtags.Value
subtag.LanguageIdentifier
s.Language
subtags.Region
subtags.Script
subtags.Variant
subtags.Structs
Unicode BCP47 Language Identifier
.Unicode Locale Identifier
.Enums
LanguageIdentifier
, Locale
,
subtags
or extensions
.