Function icu::properties::sets::load_changes_when_casefolded

pub fn load_changes_when_casefolded(
    provider: &impl DataProvider<ChangesWhenCasefoldedV1Marker>
) -> Result<CodePointSetData, PropertiesError>

Characters whose normalized forms are not stable under case folding

Example

use icu_properties::sets;

let data =
    sets::load_changes_when_casefolded(&icu_testdata::unstable())
        .expect("The data should be valid");
let changes_when_casefolded = data.as_borrowed();

assert!(changes_when_casefolded.contains('ß'));  // U+00DF LATIN SMALL LETTER SHARP S
assert!(!changes_when_casefolded.contains('ᜉ'));  // U+1709 TAGALOG LETTER PA