Function icu_properties::sets::id_start
source · pub const fn id_start() -> CodePointSetDataBorrowed<'static>
Expand description
Characters that can begin an identifier. If using NFKC to fold differences between
characters, use load_xid_start
instead. See Unicode Standard Annex #31
for more details.
✨ Enabled with the compiled_data
Cargo feature.
§Example
use icu::properties::sets;
let id_start = sets::id_start();
assert!(id_start.contains('x'));
assert!(!id_start.contains('1'));
assert!(!id_start.contains('_'));
assert!(id_start.contains('ߝ')); // U+07DD NKO LETTER FA
assert!(!id_start.contains('ⓧ')); // U+24E7 CIRCLED LATIN SMALL LETTER X
assert!(id_start.contains32(0xFC5E)); // ARABIC LIGATURE SHADDA WITH DAMMATAN ISOLATED FORM