icu_casemap::provider

Struct CaseMapUnfold

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

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.

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§map: ZeroMap<'data, PotentialUtf8, str>

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

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impl CaseMapUnfold<'_>

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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.

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

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

Returns a TokenStream that would evaluate to self. Read more
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impl<'data> BakeSize for CaseMapUnfold<'data>

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fn borrows_size(&self) -> usize

Returns the size
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impl<'data> Clone for CaseMapUnfold<'data>

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'data> Debug for CaseMapUnfold<'data>

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

Formats the value using the given formatter. Read more
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impl<'de: 'data, 'data> Deserialize<'de> for CaseMapUnfold<'data>

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl MaybeAsVarULE for CaseMapUnfold<'_>

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type EncodedStruct = [()]

The [VarULE] type for this data struct, or [()] if it cannot be represented as [VarULE].
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impl MaybeEncodeAsVarULE for CaseMapUnfold<'_>

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

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'data> Serialize for CaseMapUnfold<'data>

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

Serialize this value into the given Serde serializer. Read more
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impl<'a> Yokeable<'a> for CaseMapUnfold<'static>

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type Output = CaseMapUnfold<'a>

This type MUST be Self with the 'static replaced with 'a, i.e. Self<'a>
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fn transform(&'a self) -> &'a Self::Output

This method must cast self between &'a Self<'static> and &'a Self<'a>. Read more
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fn transform_owned(self) -> Self::Output

This method must cast self between Self<'static> and Self<'a>. Read more
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unsafe fn make(this: Self::Output) -> Self

This method can be used to cast away Self<'a>’s lifetime. Read more
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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. Read more
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impl<'zf, 'zf_inner> ZeroFrom<'zf, CaseMapUnfold<'zf_inner>> for CaseMapUnfold<'zf>

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

Clone the other C into a struct that may retain references into C.
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impl<'data> StructuralPartialEq for CaseMapUnfold<'data>

Auto Trait Implementations§

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impl<'data> Freeze for CaseMapUnfold<'data>

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impl<'data> RefUnwindSafe for CaseMapUnfold<'data>

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impl<'data> Send for CaseMapUnfold<'data>

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impl<'data> Sync for CaseMapUnfold<'data>

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impl<'data> Unpin for CaseMapUnfold<'data>

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impl<'data> UnwindSafe for CaseMapUnfold<'data>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Serialize for T
where T: Serialize + ?Sized,

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fn erased_serialize(&self, serializer: &mut dyn Serializer) -> Result<(), Error>

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fn do_erased_serialize( &self, serializer: &mut dyn Serializer, ) -> Result<(), ErrorImpl>

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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impl<T> ErasedDestructor for T
where T: 'static,