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Changelog
cats
Lightweight, modular, and extensible library for functional programming.
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v2.9.0
Cats v2.9.0 is a binary-compatible release in the 2.x series. It is published for Scala 2.12, 2.13, and 3.2+ with Scala.js 1.8+ and Scala Native 0.4.
What's Changed
Features
- Added
updated to Traverse by @nikololiahim in https://github.com/typelevel/cats/pull/4248
- Added
zipWithLongIndex, mapWithLongIndex and traverseWithLongIndexM by @nikololiahim in https://github.com/typelevel/cats/pull/4247
- Add
collectFirst to the NonEmptyCollection interface by @DavidGregory084 in https://github.com/typelevel/cats/pull/4275
- Added discipline tests for the new
Traverse laws by @nikololiahim in https://github.com/typelevel/cats/pull/4283
- Add
traverseCollect to TraverseFilter typeclass by @emilhotkowski in https://github.com/typelevel/cats/pull/4277
- Add
NonEmptyList#prependAll by @saeltz in https://github.com/typelevel/cats/pull/4267
- Add
EitherT#biSemiflatTap which combines leftSemiflatTap and by @exp0nge in https://github.com/typelevel/cats/pull/4293
semiflatTap
Optimize Alternative (part 3): add prependK/appendK specializations for Cats NE wrappers by @satorg in https://github.com/typelevel/cats/pull/4055Added parFlatMapN by @TonioGela in https://github.com/typelevel/cats/pull/4243Added Align instances for Id and Kleisli by @atnoya in https://github.com/typelevel/cats/pull/4287Add ApplicativeError#voidError by @armanbilge in https://github.com/typelevel/cats/pull/4324Optimizations
- Change the ordering of invocations in
Defer#fix by @TimWSpence in https://github.com/typelevel/cats/pull/4252
- Optimise boilerplate generators, use instance constructors by @joroKr21 in https://github.com/typelevel/cats/pull/3871
- Avoid using
NonFatal.unapply by @jhnsmth in https://github.com/typelevel/cats/pull/4282
- Use SAM syntax for typeclass instances where possible by @joroKr21 in https://github.com/typelevel/cats/pull/4279
- Singleton monoid instances by @TimWSpence in https://github.com/typelevel/cats/pull/4314
- Avoid allocations for
Monoid instances where possible by @bplommer in https://github.com/typelevel/cats/pull/4309
- Make string building a bit more efficient for
NonEmptySeq by @danicheg in https://github.com/typelevel/cats/pull/4326
Fixes
- Don't require
Order for the value on Cogen for SortedMap and NonEmptyMap by @cquiroz in https://github.com/typelevel/cats/pull/4296
- Make
cats.compat a package object for for2_13Use3 compatibility by @TonioGela in https://github.com/typelevel/cats/pull/4315
- Fix ambiguous
contains_ syntax by @armanbilge in https://github.com/typelevel/cats/pull/4320
Deprecations
- Deprecate
HashLaws#sameAsUniversalHash by @armanbilge in https://github.com/typelevel/cats/pull/4319
Documentation
- Remove LEGO from adopters list by @hejfelix in https://github.com/typelevel/cats/pull/4242
- Fix Free Monad example by @youta32449999 in https://github.com/typelevel/cats/pull/4253
- Mention
asRight and asLeft for constructing Either values by @benhutchison in https://github.com/typelevel/cats/pull/4257
- Fix comment in Free Monad example by @youta32449999 in https://github.com/typelevel/cats/pull/4259
- Add proof of inconsistency for a
Validated Monad by @TonioGela in https://github.com/typelevel/cats/pull/4255
- Mention
tupled syntax, a Cats workhorse that deserves to be more well known by @benhutchison in https://github.com/typelevel/cats/pull/4269
- Add missing
scala modifier to code block by @armanbilge in https://github.com/typelevel/cats/pull/4274
- Build docs on 2.13 by @armanbilge in https://github.com/typelevel/cats/pull/4238
- Fix list formatting in docs / site by @valencik in https://github.com/typelevel/cats/pull/4290
- Move the adopters' companies list to a separate file/page by @danicheg in https://github.com/typelevel/cats/pull/4291
- Keep the cats version up to date on the website by @danicheg in https://github.com/typelevel/cats/pull/4294
- Include laws in published API docs by @armanbilge in https://github.com/typelevel/cats/pull/4318
- Fix markdown syntax for link to
Applicative in OptionT by @yoshinorin in https://github.com/typelevel/cats/pull/4321
- Add more DocTests for
OptionT by @timo-schmid in https://github.com/typelevel/cats/pull/4311
Behind-the-scenes
- Ignore updates to cats-core by @armanbilge in https://github.com/typelevel/cats/pull/4241
- Bump base version to 2.9 by @armanbilge in https://github.com/typelevel/cats/pull/4239
- Refactored
Chain and CollectiveMonoid benchmarks by @TonioGela in https://github.com/typelevel/cats/pull/4264
- Fix obvious and straightforward warnings by @satorg in https://github.com/typelevel/cats/pull/4323
- Add commits to
.git-blame-ignore-revs by @armanbilge in https://github.com/typelevel/cats/pull/4334
- Add stack-safety test for
ContT#map by @eigenvariable in https://github.com/typelevel/cats/pull/4335
- Add release notes config by @armanbilge in https://github.com/typelevel/cats/pull/4330
Updates
- Update sbt-scalajs, scalajs-compiler, ... to 1.10.1 by @typelevel-steward in https://github.com/typelevel/cats/pull/4254
- Update nscplugin, sbt-scala-native, ... to 0.4.7 by @typelevel-steward in https://github.com/typelevel/cats/pull/4289
- Update scalacheck to 1.17.0 by @typelevel-steward in https://github.com/typelevel/cats/pull/4297
- Update scala3-library, ... to 3.2.1 by @typelevel-steward in https://github.com/typelevel/cats/pull/4337
New Contributors
- @hejfelix made their first contribution in https://github.com/typelevel/cats/pull/4242
- @youta32449999 made their first contribution in https://github.com/typelevel/cats/pull/4253
- @nikololiahim made their first contribution in https://github.com/typelevel/cats/pull/4248
- @TonioGela made their first contribution in https://github.com/typelevel/cats/pull/4255
- @emilhotkowski made their first contribution in https://github.com/typelevel/cats/pull/4277
- @valencik made their first contribution in https://github.com/typelevel/cats/pull/4290
- @exp0nge made their first contribution in https://github.com/typelevel/cats/pull/4293
- @cquiroz made their first contribution in https://github.com/typelevel/cats/pull/4296
- @atnoya made their first contribution in https://github.com/typelevel/cats/pull/4287
- @yoshinorin made their first contribution in https://github.com/typelevel/cats/pull/4321
- @eigenvariable made their first contribution in https://github.com/typelevel/cats/pull/4335
- @timo-schmid made their first contribution in https://github.com/typelevel/cats/pull/4311
Full Changelog: https://github.com/typelevel/cats/compare/v2.8.0...v2.9.0