Struct icu_normalizer::properties::CanonicalDecomposition

pub struct CanonicalDecomposition {
    decompositions: DataPayload<CanonicalDecompositionDataV1Marker>,
    tables: DataPayload<CanonicalDecompositionTablesV1Marker>,
    non_recursive: DataPayload<NonRecursiveDecompositionSupplementV1Marker>,
}

The raw (non-recursive) canonical decomposition operation.

Callers should generally use DecomposingNormalizer instead of this API. However, this API is provided for callers such as HarfBuzz that specifically want access to non-recursive canonical decomposition e.g. for use in a glyph-availability-guided custom normalizer.

Fields

decompositions: DataPayload<CanonicalDecompositionDataV1Marker>

tables: DataPayload<CanonicalDecompositionTablesV1Marker>

non_recursive: DataPayload<NonRecursiveDecompositionSupplementV1Marker>

Implementations

impl CanonicalDecomposition

pub fn decompose(&self, c: char) -> Decomposed

Performs non-recursive canonical decomposition (including for Hangul).

    use icu::normalizer::properties::Decomposed;
    let decomp = icu::normalizer::properties::CanonicalDecomposition::new();

    assert_eq!(decomp.decompose('e'), Decomposed::Default);
    assert_eq!(
        decomp.decompose('ệ'),
        Decomposed::Expansion('ẹ', '\u{0302}')
    );
    assert_eq!(decomp.decompose('각'), Decomposed::Expansion('가', 'ᆨ'));
    assert_eq!(decomp.decompose('\u{212B}'), Decomposed::Singleton('Å')); // ANGSTROM SIGN
    assert_eq!(decomp.decompose('\u{2126}'), Decomposed::Singleton('Ω')); // OHM SIGN
    assert_eq!(decomp.decompose('\u{1F71}'), Decomposed::Singleton('ά')); // oxia

fn decompose_non_hangul(&self, c: char) -> Decomposed

Performs non-recursive canonical decomposition except Hangul syllables are reported as Decomposed::Default.

pub const fn new() -> Self

Construct from compiled data.

✨ Enabled with the compiled_data Cargo feature.

📚 Help choosing a constructor

pub fn try_new_with_any_provider( provider: &(impl AnyProvider + ?Sized), ) -> Result<Self, NormalizerError>

A version of Self::new that uses custom data provided by an AnyProvider.

📚 Help choosing a constructor

pub fn try_new_unstable<D>(provider: &D) -> Result<Self, NormalizerError>

where D: DataProvider<CanonicalDecompositionDataV1Marker> + DataProvider<CanonicalDecompositionTablesV1Marker> + DataProvider<NonRecursiveDecompositionSupplementV1Marker> + ?Sized,

A version of Self::new that uses custom data provided by a DataProvider.

📚 Help choosing a constructor

⚠️ The bounds on provider may change over time, including in SemVer minor releases.

Trait Implementations

impl Debug for CanonicalDecomposition

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CanonicalDecomposition

fn default() -> Self

Returns the “default value” for a type.