Struct icu_collator::provider::CollationReorderingV1
source · pub struct CollationReorderingV1<'data> {
pub min_high_no_reorder: u32,
pub reorder_table: ZeroVec<'data, u8>,
pub reorder_ranges: ZeroVec<'data, u32>,
}
Expand description
Script reordering data
Fields§
§min_high_no_reorder: u32
Limit of last reordered range. 0 if no reordering or no split bytes.
Comment from ICU4C’s collationsettings.h
reorder_table: ZeroVec<'data, u8>
256-byte table for reordering permutation of primary lead bytes; NULL if no reordering. A 0 entry at a non-zero index means that the primary lead byte is “split” (there are different offsets for primaries that share that lead byte) and the reordering offset must be determined via the reorderRanges.
Comment from ICU4C’s collationsettings.h
reorder_ranges: ZeroVec<'data, u32>
Primary-weight ranges for script reordering, to be used by reorder(p) for split-reordered primary lead bytes.
Each entry is a (limit, offset) pair. The upper 16 bits of the entry are the upper 16 bits of the exclusive primary limit of a range. Primaries between the previous limit and this one have their lead bytes modified by the signed offset (-0xff..+0xff) stored in the lower 16 bits.
CollationData::makeReorderRanges() writes a full list where the first range (at least for terminators and separators) has a 0 offset. The last range has a non-zero offset. minHighNoReorder is set to the limit of that last range.
In the settings object, the initial ranges before the first split lead byte are omitted for efficiency; they are handled by reorder(p) via the reorderTable. If there are no split-reordered lead bytes, then no ranges are needed.
Comment from ICU4C’s collationsettings.h
; names refer to
ICU4C.
Implementations§
Trait Implementations§
source§impl<'data> Clone for CollationReorderingV1<'data>
impl<'data> Clone for CollationReorderingV1<'data>
source§fn clone(&self) -> CollationReorderingV1<'data>
fn clone(&self) -> CollationReorderingV1<'data>
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl<'data> Debug for CollationReorderingV1<'data>
impl<'data> Debug for CollationReorderingV1<'data>
source§impl<'data> PartialEq for CollationReorderingV1<'data>
impl<'data> PartialEq for CollationReorderingV1<'data>
source§fn eq(&self, other: &CollationReorderingV1<'data>) -> bool
fn eq(&self, other: &CollationReorderingV1<'data>) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl<'a> Yokeable<'a> for CollationReorderingV1<'static>
impl<'a> Yokeable<'a> for CollationReorderingV1<'static>
§type Output = CollationReorderingV1<'a>
type Output = CollationReorderingV1<'a>
Self
with the 'static
replaced with 'a
, i.e. Self<'a>
source§fn transform_owned(self) -> Self::Output
fn transform_owned(self) -> Self::Output
source§impl<'zf, 'zf_inner> ZeroFrom<'zf, CollationReorderingV1<'zf_inner>> for CollationReorderingV1<'zf>
impl<'zf, 'zf_inner> ZeroFrom<'zf, CollationReorderingV1<'zf_inner>> for CollationReorderingV1<'zf>
source§fn zero_from(this: &'zf CollationReorderingV1<'zf_inner>) -> Self
fn zero_from(this: &'zf CollationReorderingV1<'zf_inner>) -> Self
C
into a struct that may retain references into C
.