Struct icu_casemap::provider::data::CaseMapDataULE
source · pub struct CaseMapDataULE(/* private fields */);
Expand description
Packed casemappingdata type
Data format, copied from ICU4C casepropsbuilder.cpp:
Trie data word:
Bits
if(exception) {
15..4 unsigned exception index
} else {
if(not uncased) {
15..7 signed delta to simple case mapping code point
(add delta to input code point)
} else {
15..7 reserved, 0
}
6..5 0 normal character with cc=0
1 soft-dotted character
2 cc=230
3 other cc
The runtime code relies on these two bits to be adjacent with this encoding.
}
4 case-sensitive
3 exception
2 case-ignorable
1..0 0 uncased
1 lowercase
2 uppercase
3 titlecase
The runtime code relies on the case-ignorable and case type bits 2..0
to be the lowest bits with this encoding.
🚧 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.
Trait Implementations§
source§impl Clone for CaseMapDataULE
impl Clone for CaseMapDataULE
source§fn clone(&self) -> CaseMapDataULE
fn clone(&self) -> CaseMapDataULE
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for CaseMapDataULE
impl Debug for CaseMapDataULE
source§impl PartialEq for CaseMapDataULE
impl PartialEq for CaseMapDataULE
source§fn eq(&self, other: &CaseMapDataULE) -> bool
fn eq(&self, other: &CaseMapDataULE) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.source§impl ULE for CaseMapDataULE
impl ULE for CaseMapDataULE
Safety
Safety checklist for ULE
:
- The type must not include any uninitialized or padding bytes: repr(transparent) wrapper around ULE type
- The type must have an alignment of 1 byte: repr(transparent) wrapper around ULE type
- The impl of
ULE::validate_byte_slice()
must return an error if the given byte slice would not represent a valid slice of this type: It does - The impl of
ULE::validate_byte_slice()
must return an error if the given byte slice cannot be used in its entirety (if its length is not a multiple ofsize_of::<Self>()
): it does, due to the RawBytesULE parse call - All other methods must be left with their default impl, or else implemented according to their respective safety guidelines: They have been
- The equality invariant is satisfied
source§fn validate_byte_slice(bytes: &[u8]) -> Result<(), ZeroVecError>
fn validate_byte_slice(bytes: &[u8]) -> Result<(), ZeroVecError>
Validates a byte slice,
&[u8]
. Read moresource§fn parse_byte_slice(bytes: &[u8]) -> Result<&[Self], ZeroVecError>
fn parse_byte_slice(bytes: &[u8]) -> Result<&[Self], ZeroVecError>
source§unsafe fn from_byte_slice_unchecked(bytes: &[u8]) -> &[Self]
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. Read moreimpl Copy for CaseMapDataULE
impl Eq for CaseMapDataULE
impl StructuralEq for CaseMapDataULE
impl StructuralPartialEq for CaseMapDataULE
Auto Trait Implementations§
impl RefUnwindSafe for CaseMapDataULE
impl Send for CaseMapDataULE
impl Sync for CaseMapDataULE
impl Unpin for CaseMapDataULE
impl UnwindSafe for CaseMapDataULE
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more