Struct icu_normalizer::CharacterAndClass

pub(crate) struct CharacterAndClass(pub(crate) u32);

Pack a char and a CanonicalCombiningClass in 32 bits (the former in the lower 24 bits and the latter in the high 8 bits). The latter can be initialized to 0xFF upon creation, in which case it can be actually set later by calling set_ccc_from_trie_if_not_already_set. This is a micro optimization to avoid the Canonical Combining Class trie lookup when there is only one combining character in a sequence. This type is intentionally non-Copy to get compiler help in making sure that the class is set on the instance on which it is intended to be set and not on a temporary copy.

Note that 0xFF is won’t be assigned to an actual canonical combining class per definition D104 in The Unicode Standard.

Tuple Fields

0: u32

Implementations

impl CharacterAndClass

pub fn new(c: char, ccc: CanonicalCombiningClass) -> Self

pub fn new_with_placeholder(c: char) -> Self

pub fn new_with_trie_value(c_tv: CharacterAndTrieValue) -> Self

pub fn new_starter(c: char) -> Self

pub fn character(&self) -> char

pub fn ccc(&self) -> CanonicalCombiningClass

pub fn character_and_ccc(&self) -> (char, CanonicalCombiningClass)

pub fn set_ccc_from_trie_if_not_already_set( &mut self, trie: &CodePointTrie<'_, u32>, )

Trait Implementations

impl Debug for CharacterAndClass

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

Formats the value using the given formatter.