Enum CanonicalCompositionsRef 

pub(crate) enum CanonicalCompositionsRef<'data> {
    Current(&'data FastCodePointTrie<'data, u16>, &'data ZeroSlice<(u16, u16)>, &'data ZeroSlice<(char, char)>),
}

Variants

Current(&'data FastCodePointTrie<'data, u16>, &'data ZeroSlice<(u16, u16)>, &'data ZeroSlice<(char, char)>)

Implementations

impl<'data> CanonicalCompositionsRef<'data>

pub(crate) fn compose(&self, starter: char, second: char) -> Option<char>

Performs canonical composition (including Hangul) on a pair of characters or returns None if these characters don’t compose. Composition exclusions are taken into account.

TODO: Have the caller retain more state and have this function return more information that is useful for retaining information between attempts to compose in a sequence of such attempts:

• We can return the linear search slice when we search through it but don’t find anything.
• We can know that no further matches are possible.
• We can know that the starter was a special ASCII vowel.
• We can know that we just formed a Hangul LV syllable.

pub(crate) fn compose_starter( &self, starter: char, second: char, starter_is_lv: bool, ) -> Option<(char, bool)>

Performs canonical composition (including Hangul) on a pair of characters on the assumption that the second one is a starter or returns None if these characters don’t compose. Composition exclusions are taken into account.

The returned boolean can be true only if char a Hangul LV syllable.

The argument starter_is_lv must be set either to false or to the value that this method previously returned alongside starter.

Trait Implementations

impl<'data> Debug for CanonicalCompositionsRef<'data>

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

Formats the value using the given formatter.