Struct CaseMapUnfold

pub struct CaseMapUnfold<'data> {
    pub map: ZeroMap<'data, PotentialUtf8, str>,
}

Reverse case folding data. Maps from multi-character strings back to code-points that fold to those strings.

🚧 This code is considered unstable; it may change at any time, in breaking or non-breaking ways, including in SemVer minor releases. While the serde representation of data structs is guaranteed to be stable, their Rust representation might not be. Use with caution.

Fields

map: ZeroMap<'data, PotentialUtf8, str>

The actual map. Maps from strings to a list of codepoints, stored as a contiguous UTF-8 string

Implementations

impl CaseMapUnfold<'_>

pub fn try_from_icu(raw: &[u16]) -> Result<Self, DataError>

Creates a new CaseMapUnfold using data exported by the icuexportdata tool in ICU4C.

Unfold data is exported by ICU as an array of 16-bit values, representing a short header followed by a two-column key/value table. The header indicates:

• The number of rows.
• The number of UTF16 code units per row.
• The number of UTF16 code units in the first (key) column. (The number of code units in the value column can be derived from the above.)

The key in the first column is the case folding of each of the code points in the second column. Keys/values that are shorter than the column width are null-terminated. The table is sorted by key. Binary search is used to find the value.

Rust strings are UTF8 by default. To avoid the cost of converting from UTF16 on access, we convert the ICU data into a more convenient format during construction.

Trait Implementations

impl<'data> Bake for CaseMapUnfold<'data>

fn bake(&self, env: &CrateEnv) -> TokenStream

Returns a TokenStream that would evaluate to self.

impl<'data> BakeSize for CaseMapUnfold<'data>

fn borrows_size(&self) -> usize

Returns the size

impl<'data> Clone for CaseMapUnfold<'data>

fn clone(&self) -> CaseMapUnfold<'data>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'data> Debug for CaseMapUnfold<'data>

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

Formats the value using the given formatter.

impl<'de: 'data, 'data> Deserialize<'de> for CaseMapUnfold<'data>

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl MaybeAsVarULE for CaseMapUnfold<'_>

type EncodedStruct = [()]

The [VarULE] type for this data struct, or [()] if it cannot be represented as [VarULE].

impl MaybeEncodeAsVarULE for CaseMapUnfold<'_>

fn maybe_encode_as_varule(&self) -> Option<&Self::EncodedStruct>

Returns the [MaybeAsVarULE::EncodedStruct] that represents this data struct, or None if the data struct does not support this representation.

impl<'data> PartialEq for CaseMapUnfold<'data>

fn eq(&self, other: &CaseMapUnfold<'data>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'data> Serialize for CaseMapUnfold<'data>

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'a> Yokeable<'a> for CaseMapUnfold<'static>

type Output = CaseMapUnfold<'a>

This type MUST be Self with the 'static replaced with 'a, i.e. Self<'a>

fn transform(&'a self) -> &'a Self::Output

This method must cast self between &'a Self<'static> and &'a Self<'a>.

fn transform_owned(self) -> Self::Output

This method must cast self between Self<'static> and Self<'a>.

unsafe fn make(this: Self::Output) -> Self

This method can be used to cast away Self<'a>’s lifetime.

fn transform_mut<F>(&'a mut self, f: F)

where F: 'static + for<'b> FnOnce(&'b mut Self::Output),

This method must cast self between &'a mut Self<'static> and &'a mut Self<'a>, and pass it to f.

impl<'zf, 'zf_inner> ZeroFrom<'zf, CaseMapUnfold<'zf_inner>> for CaseMapUnfold<'zf>

fn zero_from(this: &'zf CaseMapUnfold<'zf_inner>) -> Self

Clone the other C into a struct that may retain references into C.

impl<'data> StructuralPartialEq for CaseMapUnfold<'data>