litemap

Discovered and reported by @Shnatsel

These impls were backwards and unsound.

This is technically a breaking change, however if you had code that
relied upon this then it was basically guaranteed to be unsound.

Changelog: N/A

(This contains its own changelog addition as this is an out of cycle
yoke release)

• General data model
  • Non-exhaustive errors for locid, calendar, decimal, plurals (unicode-org#1792, unicode-org#1793)
  • Rename "serialize" feature to "serde" (unicode-org#1797)
  • Turn all errors into Copy types (unicode-org#1657)
  • Components
    • calendar:
      • Coptic, Indian and Ethiopian calendars (unicode-org#1660, unicode-org#1715, unicode-org#1779)
      • Calendar arithmetic (unicode-org#1614)
    • datetime:
      • Formatting for fractional seconds (unicode-org#1813, unicode-org#1801)
      • Support for day of week in month ('F') (unicode-org#1770)
      • Custom fallbacking for TimeZoneFormatter (unicode-org#1591)
      • Support for week-of-month (unicode-org#1468)
      • Bug fix to get_best_available_format_pattern skeleton matching logic (unicode-org#1549)
    • decimal: No updates
    • locale_canonicalizer:
      • ZeroCopy support (unicode-org#1760, unicode-org#1777)
    • locid:
      • Simplified language representation (unicode-org#1695)
      • Region, Script and Variant subtags ULE (unicode-org#1696)
    • plurals:
      • Update data model to use ZeroVec (unicode-org#1240)
    • properties:
      • Bidi support (unicode-org#1716, unicode-org#1784)
  • Utilities
    • codepointtrie:
      • Use 0 for error value for Rust out-of-bounds for primitive trie value types (unicode-org#1804)
    • crlify: New util for line ending conversions
    • deduplicating_array: No updates
    • fixed_decimal:
      • Improvements to FixedDecimal f64 APIs (unicode-org#1718)
    • litemap:
      • Pluggable LiteMap backends (unicode-org#1769)
    • pattern: No updates
    • uniset: No updates
    • writeable: No updates
    • yoke: No updates
    • zerofrom: No updates
    • zerovec:
      • ZeroVec derive improvements (unicode-org#1780)
      • Support non-Ord values in ZeroMap (unicode-org#1743)
      • Add OptionULE and OptionVarULE (unicode-org#1736)
      • Rename ZeroVec::from_slice and add new method for const-constructed ZeroSlice (unicode-org#1728)
      • Treat ZeroMap sort order as an optional invariant (unicode-org#1727)
      • Add ZeroMap::get_copied_by (unicode-org#1722)
      • Generalize PairULE to support longer tuples (unicode-org#1721)
      • Add more AsULE impls for primitives (unicode-org#1672)
      • Add cast methods to ZeroVec and ZeroSlice (unicode-org#1651)
      • Add RawBytesULE::slice_from_byte_slice (unicode-org#1648)
      • Create façades for ZeroVec types, hide internal code organization modules (unicode-org#1629)
      • Add zerovec::skip_kv and zerovec::skip_ord attributes, as well as generalized attribute handling framework (unicode-org#1613)
      • Rename as_unaligned to to_unaligned (unicode-org#1619)
  • FFI:
    • Updating to Diplomat 0.3
    • Making testdata an optional FFI dep (unicode-org#1820)
    • Split out capi targets: make separate freertos, staticlib, and cdylib crates as targets (unicode-org#1747)
  • Experimental:
    • crabbake: Initial version of baked data provider (unicode-org#1825)
    • segmenter:
      • Support production-ready data provider for segmenters (unicode-org#1652)
      • Implement dictionary based segmenter for line segmenter. (unicode-org#1644)
      • Wire DataProvider into UAX29 segmenters (unicode-org#1627)
      • Move UAX#14 defines to line.toml (unicode-org#1568)
      • Add segmenter factories to generate UAX29 iterators (unicode-org#1602)

• General data model
  • DataPayload no longer needs a lifetime (unicode-org#1297, unicode-org#1279)
  • Re-write DataKey (unicode-org#1511)
  • Rewrite ErasedDataProvider as AnyProvider (unicode-org#1495)
  • Add EitherProvider and rename IterableDataProviderCore to IterableProvider (unicode-org#1455)
  • Change DataRequest to be borrowed in BufferProvider (unicode-org#1416)
  • Replace SerdeDeDataProvider with BufferProvider (unicode-org#1369, unicode-org#1384)
  • Components
    • calendar:
      • Julian, Japanese, and Buddhist calendars (unicode-org#1351, unicode-org#1394, unicode-org#1305)
      • DateTimeFormat integration (unicode-org#1339)
      • Bugfix around arithmetic (unicode-org#1352)
    • datetime:
      • Week-of-year support (unicode-org#1206)
      • DateTimeFormat::resolve_components() (unicode-org#1362)
      • Era formatting (unicode-org#1346)
      • TimeZoneFormatterConfig (unicode-org#1256)
      • New data model for organizing calendar data (unicode-org#1300)
      • Bugfix around missing localized strings in time zone data (unicode-org#1405)
    • decimal: No updates
    • locale_canonicalizer:
      • Bugfix in maximization (unicode-org#1171)
      • Update data model to use LiteMap (unicode-org#1275)
    • locid: No updates
    • plurals:
      • Update data model to use ZeroVec (unicode-org#1240)
    • properties:
      • Rename resource key category for properties (unicode-org#1406)
      • Rename enums for General_Category (unicode-org#1355)
      • Implement the Canonical_Combining_Class property (unicode-org#1347)
      • Implement Script_Extensions property (unicode-org#1353)
      • Add General_Category predicate functions (unicode-org#1310)
      • Implement Grapheme_Cluster_Break, Word_Break, and Sentence_Break Unicode properties (unicode-org#1233)
  • Utilities
    • codepointtrie: No changes
    • deduplicating_array: New utility for efficient serialized representation of data with duplicates
    • fixed_decimal:
      • Padding and truncation APIs (unicode-org#1482, unicode-org#1507, unicode-org#1195)
      • Add double-to-decimal via ryū (unicode-org#1217)
      • Handle exponents in FixedDecimal::from_str() (unicode-org#1265)
    • litemap:
      • Add LiteMap::get_indexed() and LiteMap::find_index()
      • Handle serialization of tuples (etc) in litemaps (unicode-org#1306)
    • pattern: No updates
    • uniset: No updates
    • writeable:
      • Adding parts functionality to Writeable (unicode-org#1438)
      • Change Writeable::writeable_to_string to return a Cow (unicode-org#1452)
      • Implementing Writeable for all integers (unicode-org#1408)
      • Making writeable::LengthHint a range (unicode-org#1400)
      • Simplifying assert_writeable_parts_eq and assert_writeable_eq (unicode-org#1522, unicode-org#1399)
    • yoke:
      • Remove Yokeable::Output from ZeroCopyFrom trait (unicode-org#1499)
      • Add EitherCart (unicode-org#1484)
      • Remove attach_to_option_cart() (unicode-org#1348)
      • Homogenize yoke generic impls to always work with Yokeable, add OwnedYokeable (unicode-org#1302)
    • zerovec:
      • Move over to a model where the vector types deref to ZeroSlice and VarZeroSlice (unicode-org#1418, unicode-org#1371)
      • Simplify ZeroVec/VarZeroVec error handling, consolidate ULEError type (unicode-org#1389)
      • Simplify ZeroMapKV (unicode-org#1334)
      • Add ZeroMap2d, a two-dimensional zero-copy map (unicode-org#1432)
      • Add borrowed-only version of ZeroMap (unicode-org#1238)
      • Add various helper functions to zerovec (unicode-org#1430)
      • Rename PlainOldULE to RawBytesULE (unicode-org#1413)
      • Improve EncodeAsVarULE (unicode-org#1385)
      • Add EncodeAsVarULE for ZeroVec (unicode-org#1274, unicode-org#1407)
      • Various trait impls (unicode-org#1332, unicode-org#1330, unicode-org#1328, unicode-org#1287)
      • Document ULE alignment guarantee; update all impls with checklists (unicode-org#1294)
      • Fix PairULE validation function (unicode-org#1266)
  • FFI:
    • Updating to the latest Diplomat
    • Add FFI for constructing Data Structs, including decimal data structs (unicode-org#1497)
    • Add padding/truncation to FFI (unicode-org#1501)
    • Add FFI for constructing fixed decimals from float (unicode-org#1483)
    • Properties FFI (unicode-org#1269)
  • Experimental:
    • New ListFormatter experiment
    • More progress on segmentation experiment

• Updated to CLDR 40 (unicode-org#1216)
  • Functional Unicode property APIs and data; moved to new crate icu_properties (unicode-org#148)
  • DateTimeFormat optimization: memory usage cut by two-thirds and perf improved by 40% (unicode-org#519)
  • BlobDataProvider allowing for dynamic, asynchronous data loading (unicode-org#1084)
  • Major upgrades to the zerovec utility crate and new benchmarks for ZeroMap (unicode-org#1082, unicode-org#1087)
  • Initial support for time zones in DateTimeFormat components bag (unicode-org#845)
  • Bug fixes in LocaleCanicalizer (unicode-org#1189, etc.)
  • Week of month/year arithmetic (unicode-org#918)
  • Major improvements on code size across FFI (unicode-org#962)
  • Iterations on ICU4X Segmenter (unicode-org#1045, unicode-org#1165, etc.)
  • Experimental ListFormatter (unicode-org#1053)
  • ICU4X now requires Rust 1.56 (unicode-org#1201)

• Static data provider without filesystem dependency (unicode-org#78)
  • Infrastructure around zero-copy deserialization, including ZeroVec and Yoke (unicode-org#652, unicode-org#667)
  • Most ICU4X components support no_std (unicode-org#812)
  • Hour cycle preferences are used by DateTimeFormat (unicode-org#671)
  • Skeleton matching supports additional field widths (unicode-org#584)
  • Add canonicalize method to LocaleCanonicalizer (unicode-org#747)
  • Added range iterator on UnicodeSet (unicode-org#836)
  • Add PluralRules::categories() function (unicode-org#789)
  • Consolidated data generation tool into new binary icu4x-datagen

• Updated CLDR to 39 (unicode-org#640)
  • Initial release of:
    • icu_decimal (unicode-org#590)
    • icu_locale_canonicalizer (unicode-org#417)
  • DateTimeFormat gets support for
    • day periods (unicode-org#435)
    • time zones (unicode-org#418)
    • components bag (unicode-org#481)
  • UnicodeSet gets preliminary support for L3a subset (unicode-org#478)
  • PluralRules support E operand (unicode-org#407)
  • New utilities:
    • Writeable
    • ZeroVec
    • LiteMap
    • FixedDecimal
    • Pattern
  • Early prototype of C API - icu_capi

• Initial release of ICU4X.
  • Initial release of:
    • icu
    • icu_locid
    • icu_plurals
    • icu_datetime
    • icu_uniset
    • icu_provider
    • icu_provider_fs
    • icu_provider_cldr
    • icu_testdata
    • icu4x_ecma402
    • fixed_decimal