Macro icu_locid_macros::langid [−][src]
langid!() { /* proc-macro */ }
Expand description
A macro allowing for compile-time construction of valid LanguageIdentifier
.
The macro will perform syntax canonicalization of the tag.
Examples
use icu::locid::LanguageIdentifier; use icu::locid::macros::langid; const DE_AT: LanguageIdentifier = langid!("de_at"); let de_at: LanguageIdentifier = "de_at".parse() .expect("Failed to parse language identifier."); assert_eq!(DE_AT, "de-AT"); assert_eq!(DE_AT, de_at);
Note: As of Rust 1.47, the macro cannot produce language identifier
with variants in the const mode pending Heap Allocations in Constants
.