Struct icu_casemap::provider::exception_helpers::ExceptionBitsULE

#[repr(transparent)]
pub struct ExceptionBitsULE(pub u8);

The bitflags on an exception header.

Format from icu4c, documented in casepropsbuilder.cpp, shifted 8 bits since ICU4C has this packed alongside a SlotPresence

           0  Double-width slots. If set, then each optional slot is stored as two
              elements of the array (high and low halves of 32-bit values) instead of
              a single element.
           1  Has no simple case folding, even if there is a simple lowercase mapping
          2  The value in the delta slot is negative
          3  Is case-sensitive (not exposed)
      4..5  Dot type
          6  Has conditional special casing
          7  Has conditional case folding

All bits are valid, though in ICU4X data bits 0 and 2 are not used

🚧 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.

Tuple Fields

0: u8

Implementations

impl ExceptionBitsULE

const DOUBLE_SLOTS_FLAG: u8 = 1u8

const NO_SIMPLE_CASE_FOLDING_FLAG: u8 = 2u8

const NEGATIVE_DELTA_FLAG: u8 = 4u8

const SENSITIVE_FLAG: u8 = 8u8

const DOT_SHIFT: u8 = 4u8

const CONDITIONAL_SPECIAL_FLAG: u8 = 64u8

const CONDITIONAL_FOLD_FLAG: u8 = 128u8

impl ExceptionBitsULE

pub fn double_width_slots(self) -> bool

Whether or not the slots are double-width.

Unused in ICU4X

pub fn no_simple_case_folding(self) -> bool

There is no simple casefolding, even if there is a simple lowercase mapping

pub fn negative_delta(self) -> bool

The delta stored in the Delta slot is negative

pub fn is_sensitive(self) -> bool

If the character is case sensitive

pub fn has_conditional_special(self) -> bool

If the character has conditional special casing

pub fn has_conditional_fold(self) -> bool

If the character has conditional case folding

pub fn dot_type(self) -> DotType

The dot type of the character

Trait Implementations

impl Clone for ExceptionBitsULE

fn clone(&self) -> ExceptionBitsULE

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ExceptionBitsULE

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

Formats the value using the given formatter.

impl PartialEq for ExceptionBitsULE

fn eq(&self, other: &ExceptionBitsULE) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

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

impl ULE for ExceptionBitsULE

fn validate_byte_slice(bytes: &[u8]) -> Result<(), ZeroVecError>

Validates a byte slice, &[u8].

fn parse_byte_slice(bytes: &[u8]) -> Result<&[Self], ZeroVecError>

Parses a byte slice, &[u8], and return it as &[Self] with the same lifetime.

unsafe fn from_byte_slice_unchecked(bytes: &[u8]) -> &[Self]

Takes a byte slice, &[u8], and return it as &[Self] with the same lifetime, assuming that this byte slice has previously been run through Self::parse_byte_slice() with success.

fn as_byte_slice(slice: &[Self]) -> &[u8]

Given &[Self], returns a &[u8] with the same lifetime.

impl Copy for ExceptionBitsULE

impl Eq for ExceptionBitsULE

impl StructuralPartialEq for ExceptionBitsULE