v0.16.0

This is the first release with support for type class derivation on Scala 3! 🥳

It adds derivation for the type classes FunctorK, ContravariantK, InvariantK, SemigroupalK and ApplyK. One caveat compared to Scala 2 is that algebras with type members are not supported. The derivation macros are experimental meaning that call-sites need to be annotated with @experimental. Alternatively, users can enable the -experimental compiler option starting with Scala 3.4. The reasons for both limitations are rooted in the underlying macro APIs.

What's Changed

• Update scala3-library, ... to 3.3.0 by @pomadchin in #429
• check binary compatibility with v0.14.0 wherever possible by @bpholt in #430
• Added examples project by @vasiliybondarenko in #418
• Fix microsite links by @joroKr21 in #437
• Support Semigroupal for more complex types by @joroKr21 in #438
• Quality of life improvements in DeriveMacros by @joroKr21 in #439
• Fix FunctorK when F occurs only in contravariant position by @joroKr21 in #440
• Add FunctorK instance for FS2 Stream by @m50d in #443
• Derive SemigroupK by @joroKr21 in #441
• Derive MonoidK, fix SemigroupK by @joroKr21 in #445
• Update Ruby and Jekyll by @joroKr21 in #507
• Exclude metals.sbt from scalafmt by @joroKr21 in #511
• Scala3 FunctorK macros by @pomadchin in #442
• Scala3 SemigroupalK and InvariantK macros by @pomadchin in #513
• Scala3 ContravariantK macros by @pomadchin in #518
• Scala3 ApplyK macros and SemigroupalK derivation improvement by @pomadchin in #516
• Handle repeated and by-name parameters by @joroKr21 in #519
• Hacky solution of the Tuple2K problem by @joroKr21 in #520
• [Scala 3] Use Semigroup to combine results in SemigroupalK derivation by @joroKr21 in #521
• Consolidate Derive API between Scala 2 and Scala 3 by @joroKr21 in #522

Dependency Updates

• Update sbt to 1.9.0 by @typelevel-steward in #431
• Update nscplugin, sbt-scala-native, ... to 0.4.13 by @typelevel-steward in #432
• Update sbt-typelevel, ... to 0.4.22 by @typelevel-steward in #433
• Update nscplugin, sbt-scala-native, ... to 0.4.14 by @typelevel-steward in #434
• Update scala-compiler, scala-library, ... to 2.12.18 by @typelevel-steward in #435
• Update scala-compiler, scala-library, ... to 2.13.11 by @typelevel-steward in #436
• Update scalafmt-core to 3.7.4 by @typelevel-steward in #426
• Update sbt-scalajs, scalajs-compiler, ... to 1.13.2 by @typelevel-steward in #444
• Update sbt to 1.9.1 by @typelevel-steward in #446
• Update scalafmt-core to 3.7.5 by @typelevel-steward in #447
• Update scalafmt-core to 3.7.6 by @typelevel-steward in #448
• Update scalafmt-core to 3.7.7 by @typelevel-steward in #449
• Update sbt-scala-native-crossproject to 1.3.2 by @typelevel-steward in #450
• Update sbt to 1.9.2 by @typelevel-steward in #451
• Update scalafmt-core to 3.7.8 by @typelevel-steward in #452
• Update scalafmt-core to 3.7.9 by @typelevel-steward in #453
• Update scalafmt-core to 3.7.10 by @typelevel-steward in #454
• Update sbt to 1.9.3 by @typelevel-steward in #455
• Update scalafmt-core to 3.7.11 by @typelevel-steward in #456
• Update fs2-core to 3.8.0 by @typelevel-steward in #457
• Update scalafmt-core to 3.7.12 by @typelevel-steward in #458
• Update cats-core, cats-free, cats-laws, ... to 2.10.0 by @typelevel-steward in #459
• Update sbt to 1.9.4 by @typelevel-steward in #461
• Update scalafmt-core to 3.7.13 by @typelevel-steward in #462
• Update fs2-core to 3.9.0 by @typelevel-steward in #463
• Update fs2-core to 3.9.1 by @typelevel-steward in #464
• Update circe-core to 0.14.6 by @typelevel-steward in #465
• Update scalafmt-core to 3.7.14 by @typelevel-steward in #466
• Update nscplugin, sbt-scala-native, ... to 0.4.15 by @typelevel-steward in #467
• Update scala3-library, ... to 3.3.1 by @typelevel-steward in #468
• Update sbt-typelevel, ... to 0.5.2 by @typelevel-steward in #471
• Update scala-compiler, scala-library, ... to 2.13.12 by @typelevel-steward in #470
• Update fs2-core to 3.9.2 by @typelevel-steward in #472
• Update sbt to 1.9.5 by @typelevel-steward in #473
• Update sbt to 1.9.6 by @typelevel-steward in #474
• Update sbt-typelevel, ... to 0.5.3 by @typelevel-steward in #475
• Update sbt-scalajs, scalajs-compiler, ... to 1.14.0 by @typelevel-steward in #476
• Update sbt-typelevel, ... to 0.5.4 by @typelevel-steward in #477
• Update sbt-mdoc to 2.3.8 by @typelevel-steward in #478
• Update nscplugin, sbt-scala-native, ... to 0.4.16 by @typelevel-steward in #479
• Update sbt-typelevel, ... to 0.6.0 by @typelevel-steward in #480
• Update sbt-mdoc to 2.4.0 by @typelevel-steward in #481
• Update sbt to 1.9.7 by @typelevel-steward in #482
• Update scalafmt-core to 3.7.15 by @typelevel-steward in #483
• Update sbt-typelevel, ... to 0.6.1 by @typelevel-steward in #484
• Update fs2-core to 3.9.3 by @typelevel-steward in #485
• Update sbt-mdoc to 2.5.0 by @typelevel-steward in #486
• Update sbt-microsites to 1.4.4 by @typelevel-steward in #487
• Update sbt-mdoc to 2.5.1 by @typelevel-steward in #488
• Update sbt-typelevel, ... to 0.6.2 by @typelevel-steward in #490
• Update scalafmt-core to 3.7.17 by @typelevel-steward in #491
• Update sbt-typelevel, ... to 0.6.3 by @typelevel-steward in #492
• Update sbt-typelevel, ... to 0.6.4 by @typelevel-steward in #494
• Update sbt to 1.9.8 by @typelevel-steward in #493
• Update sbt-mdoc to 2.5.2 by @typelevel-steward in #495
• Update sbt-typelevel, ... to 0.6.5 by @typelevel-steward in #496
• Update sbt-scalajs, scalajs-compiler, ... to 1.15.0 by @typelevel-steward in #497
• Update nscplugin, sbt-scala-native, ... to 0.4.17 by @typelevel-steward in #498
• Update fs2-core to 3.9.4 by @typelevel-steward in #499
• Update sbt-typelevel, ... to 0.6.6 by @typelevel-steward in #500
• Update scalafmt-core to 3.8.0 by @typelevel-steward in #501
• Update sbt to 1.9.9 by @typelevel-steward in #502
• Update kind-projector to 0.13.3 by @typelevel-steward in #503
• Update sbt-typelevel, ... to 0.6.7 by @typelevel-steward in #504
• Update scala-compiler, s...

v0.15.0

Now available for Scala 2.12, 2.13 and partially for Scala 3 on the JVM, JS and Native. Many thanks to all contributors ❤️

This is the first release that adds partial support for Scala 3 to the core and laws modules! 🥳
This means that the typeclasses themselves and their laws are published for Scala 3, but not yet automatic derivation.
We will need to have a little more patience for this long awaited addition, but hopefully some users can already be unblocked.
Special thanks to @pomadchin for this release and for the ongoing work on cats-tagless for Scala 3.
This involves no less than a complete rewrite of typeclass derivation with the new macro system!

What's Changed

• Add ReaderT test demonstrating lifting side-effecting algebras by @joroKr21 in #250
• Fix doctest after scalafmt update by @joroKr21 in #265
• Enable -Xsource:3 and remove instances which become unnecessary by @joroKr21 in #273
• Migrate to sbt-typelevel by @armanbilge in #314
• Documentation: Warning and resolution for multiple annotations by @msinton in #328
• Setup Mergify with sbt-typelevel by @joroKr21 in #332
• Fix typelevel-steward bot name by @joroKr21 in #354
• Updates come from typelevel-steward now by @armanbilge in #348
• Replace deprecated Sonatype repos by @joroKr21 in #363
• Add one more ReaderT test with effectful provider by @joroKr21 in #366
• Move Circe-based tests to shared sources by @joroKr21 in #373
• Make tests a pure cross project by @joroKr21 in #375
• Rewrite to new syntax by @joroKr21 in #386
• Initial Core Scala 3 cross compilation support by @pomadchin in #425

Dependency updates:

• Update sbt to 1.5.1 by @scala-steward in #235
• Update sbt-microsites to 1.3.4 by @scala-steward in #236
• Update scalacheck to 1.15.4 by @scala-steward in #237
• Update sbt to 1.5.2 by @scala-steward in #238
• Update discipline-munit to 1.0.9 by @scala-steward in #241
• Update discipline-core to 1.1.5 by @scala-steward in #240
• Update cats-core, cats-free, cats-laws, ... to 2.6.1 by @scala-steward in #239
• Update mdoc, sbt-mdoc to 2.2.21 by @scala-steward in #242
• Update scala-compiler, scala-library, ... to 2.13.6 by @scala-steward in #243
• Update sbt-tpolecat to 0.1.18 by @scala-steward in #244
• Update sbt-github-actions to 0.11.0 by @scala-steward in #245
• Update sbt-spiewak-sonatype to 0.21.0 by @scala-steward in #246
• Update circe-core to 0.14.0 by @scala-steward in #247
• Update sbt-tpolecat to 0.1.19 by @scala-steward in #249
• Update circe-core to 0.14.1 by @scala-steward in #248
• Update scala-compiler, scala-library, ... to 2.12.14 by @scala-steward in #251
• Update sbt to 1.5.3 by @scala-steward in #252
• Update sbt-tpolecat to 0.1.20 by @scala-steward in #253
• Update sbt-github-actions to 0.12.0 by @scala-steward in #254
• Update sbt-scalajs, scalajs-library, ... to 1.6.0 by @scala-steward in #255
• Update sbt to 1.5.4 by @scala-steward in #256
• Update sbt-scala-native-crossproject, ... to 1.1.0 by @scala-steward in #257
• Update sbt-scalafmt to 2.4.3 by @scala-steward in #258
• Update sbt to 1.5.5 by @scala-steward in #259
• Update mdoc, sbt-mdoc to 2.2.22 by @scala-steward in #260
• Update sbt-scalajs, scalajs-compiler, ... to 1.7.0 by @scala-steward in #262
• Update sbt-github-actions to 0.13.0 by @scala-steward in #263
• Update scalafmt-core to 3.0.0 by @scala-steward in #264
• Update sbt-spiewak-sonatype to 0.22.0 by @scala-steward in #266
• Update kind-projector to 0.13.1 by @scala-steward in #267
• Update mdoc, sbt-mdoc to 2.2.23 by @scala-steward in #268
• Update scalafmt-core to 3.0.1 by @scala-steward in #269
• Update kind-projector to 0.13.2 by @scala-steward in #271
• Update scalafmt-core to 3.0.2 by @scala-steward in #270
• Update scalafmt-core to 3.0.3 by @scala-steward in #272
• Update sbt-spiewak-sonatype to 0.22.1 by @scala-steward in #275
• Update scalafmt-core to 3.0.4 by @scala-steward in #276
• Update scala-compiler, scala-library, ... to 2.12.15 by @scala-steward in #274
• Update scalafmt-core to 3.0.5 by @scala-steward in #277
• Update scalafmt-core to 3.0.6 by @scala-steward in #278
• Update sbt-scalajs, scalajs-compiler, ... to 1.7.1 by @scala-steward in #279
• Update discipline-core to 1.2.0 by @scala-steward in #280
• Update mdoc, sbt-mdoc to 2.2.24 by @scala-steward in #281
• Update scalafmt-core to 3.0.7 by @scala-steward in #282
• Update auxlib, javalib, nativelib, nscplugin, ... to 0.4.1 by @scala-steward in #283
• Update discipline-core to 1.3.0 by @scala-steward in #284
• Update scalafmt-core to 3.0.8 by @scala-steward in #285
• Update scala-compiler, scala-library, ... to 2.13.7 by @scala-steward in #286
• Update scalafmt-core to 3.1.0 by @scala-steward in #287
• Update scalafmt-core to 3.1.1 by @scala-steward in #288
• Update sbt-scalafmt to 2.4.4 by @scala-steward in #289
• Update scalafmt-core to 3.1.2 by @scala-steward in #290
• Update scalafmt-core to 3.2.0 by @scala-steward in #292
• Update sbt-github-actions to 0.14.2 by @scala-steward in #295
• Update scalafmt-core to 3.2.1 by @scala-steward in #296
• Update sbt-scalafmt to 2.4.5 by @scala-steward in #297
• Update auxlib, javalib, nativelib, nscplugin, ... to 0.4.2 by @scala-steward in #298
• Update discipline-core to 1.4.0 by @scala-steward in #299
• Update sbt to 1.5.6 by @scala-steward in #300
• Update sbt-scalajs, scalajs-compiler, ... to 1.8.0 by @scala-steward in #301
• Update sbt to 1.5.7 by @scala-steward in #302
• Update sbt to 1.5.8 by @scala-steward in #303
• Update scalafmt-core to 3.2.2 by @scala-steward in #304
• Update scalafmt-core to 3.3.0 by @scala-steward in #306
• Update sbt-scalafmt to 2.4.6 by @scala-steward in #305
• Update sbt to 1.6.0 by @scala-steward in #307
• Update sbt to 1.6.1 by @scala-steward in #308
• Update scalafmt-core to 3.3.1 by @scala-steward in #309
• Update scala-compiler, scala-library, ... to 2.13.8 by @scala-steward in #312
• Update scalafmt-core to 3.3.2 by @scala-steward in #313
• Update auxlib, javalib, nativelib, nscplugin, ... to 0.4.3 by @scala-steward in ht...

Cats-tagless 0.14.0

Now available for Scala 2.12 and 2.13 on JVM, JS and Native. Thanks to all contributors ❤️
New - extended support for SemigroupalK, credit to @ivan-klass for the idea!

Feature enhancements

• Extend SemigroupalK support to parameter occurrences (#231 by @joroKr21)

Documentation improvements

• Fix documentation for ContravariantK (#230 by @ivan-klass)

Build changes

• Stop publishing snapshots (#229 by @joroKr21)
• Remove GPG_TTY environment variable (#228 by @joroKr21)

Dependency updates

• Update mdoc, sbt-mdoc to 2.2.20 (#234 by @scala-steward)
• Update discipline-munit to 1.0.8 (#232 by @scala-steward)
• Update cats-core, cats-free, cats-laws, ... to 2.6.0 (#233 by @scala-steward)

Cats-tagless 0.13.0

Now available for Scala 2.12 and 2.13. Thanks to all contributors ❤️
New - first release supporting Scala Native 🎉

Build changes

• Add Scala native support (#211 by @joroKr21)
• Replace sbt-catalyst with sbt-spiewak (#210 by @joroKr21)
• Converted from Travis to sbt-github-actions (#179 by @djspiewak)
• remove explicit scalatestplus-scalacheck dependency (#178 by @larsrh)
• Setup scalafmt (#167 by @joroKr21)

• Fix root project and publish snapshots (#227 by @joroKr21)
• Delete version.sbt (#226 by @joroKr21)
• Configure organization at ThisBuild level (#225 by @joroKr21)
• Fix doc options and don't publish snapshots (#221 by @joroKr21)
• Add GPG_TTY environment variable (#217 by @joroKr21)
• Add setup-gpg step (#216 by @joroKr21)
• Build fixes to enable publishing (#215 by @joroKr21)

Documentation

• Migrating microsite to Mdoc (#105 by @gvolpe)
• Don't evaluate and print huge stack overflow error (#195 by @joroKr21)
• Call out need for -Ymacro-annotations (#182 by @keirlawson)

Refactoring

• Replace simulacrum with the expanded source code (#203 by @joroKr21)

Dependency updates

• Update sbt to 1.5.0 (#224 by @scala-steward)
• Update sbt-scalajs, scalajs-compiler, ... to 1.5.1 (#223 by @scala-steward)
• Update sbt-microsites to 1.3.3 (#222 by @scala-steward)
• Update cats-core, cats-free, cats-laws, ... to 2.5.0 (#219 by @scala-steward)
• Update discipline-munit to 1.0.7 (#220 by @scala-steward)
• Update mdoc_2.12, mdoc_2.13, sbt-mdoc to 2.2.19 (#218 by @scala-steward)
• Update sbt-tpolecat to 0.1.17 (#214 by @scala-steward)
• Update sbt to 1.4.9 (#213 by @scala-steward)
• Update sbt to 1.4.8 (#212 by @scala-steward)
• Scala 2.13.5 (#209 by @joroKr21)
• Update cats-core, cats-free, cats-laws, ... to 2.4.2 (#204 by @scala-steward)
• Update discipline-scalatest to 2.1.2 (#206 by @scala-steward)
• Update sbt-catalysts to 0.43 (#207 by @scala-steward)
• Update mdoc_2.12, sbt-mdoc to 2.2.18 (#205 by @scala-steward)
• Update cats-core, cats-free, cats-laws, ... to 2.4.1 (#202 by @scala-steward)
• Update cats-core, cats-free, cats-laws, ... to 2.4.0 (#201 by @scala-steward)
• Update mdoc_2.12, sbt-mdoc to 2.2.17 (#200 by @scala-steward)
• Update sbt-microsites to 1.3.2 (#199 by @scala-steward)
• Update sbt to 1.4.7 (#198 by @scala-steward)
• Scala 2.12.13 (#196 by @joroKr21)
• Update sbt-microsites to 1.3.1 (#197 by @scala-steward)
• Update sbt-microsites to 1.3.0 (#193 by @scala-steward)
• Update mdoc, sbt-mdoc to 2.2.16 (#194 by @scala-steward)
• Update sbt-catalysts to 0.42 (#191 by @scala-steward)
• Update sbt-github-actions to 0.10.1 (#189 by @scala-steward)
• Update sbt-doctest to 0.9.9 (#190 by @scala-steward)
• Update kind-projector to 0.11.3 (#187 by @scala-steward)
• Update sbt to 1.4.6 (#186 by @scala-steward)
• Update discipline-scalatest to 2.1.1 (#185 by @scala-steward)
• Update cats-core, cats-free, cats-laws, ... to 2.3.1 (#184 by @scala-steward)
• Update sbt to 1.4.5 (#183 by @scala-steward)
• Update kind-projector to 0.11.2 (#181 by @scala-steward)
• Scala 2.13.4 (#180 by @joroKr21)
• Update cats-core, cats-free, cats-laws, ... to 2.3.0 (#176 by @scala-steward)
• Update sbt to 1.4.4 (#175 by @scala-steward)
• Update kind-projector to 0.11.1 (#174 by @scala-steward)
• Update sbt to 1.4.3 (#173 by @scala-steward)
• Update discipline-scalatest to 2.1.0 (#172 by @scala-steward)
• Update sbt-doctest to 0.9.8 (#171 by @scala-steward)
• Update sbt to 1.4.2 (#168 by @scala-steward)

Cats-tagless 0.12

Now available for Scala 2.12 and 2.13. Thanks to all contributors ❤️

API / Feature enhancements

• Bring back algebraName at Instrumentation and add it to Aspect (#155 by @Fristi)
• (Inv/Cov/Con)-FunctorK and SemigroupalK instances for core cats classes (#97 by @cosmin33)
• Dependency injection via ReaderT (#153 by @joroKr21)
• Add laws for Aspect and Instrument (#156 by @joroKr21)
• Add Aspect that can do a form of AOP in Tagless Final with type classes (#141 by @joroKr21)
• Add derivation of const / void algebra implementations (#152 by @joroKr21)

Bug fixes

• Fix byname parameters when they have to be transformed (#134 by @joroKr21)
• Fix swapped type parameters of contramapK in mapK (#115 by @joroKr21)

Documentation enhancements

• update README with sbt settings for cross-Scala-version builds (#120 by @bpholt)

Test improvements

• Add tests for cats.data instances (#159 by @joroKr21)

Build changes

• Update Catalyst and Cats, drop Scala 2.11 (#140 by @joroKr21)

Dependency updates

• Update sbt-catalysts to 0.41 (#166 by @scala-steward)
• Update sbt to 1.4.1 (#165 by @scala-steward)
• Update sbt to 1.4.0 (#164 by @scala-steward)
• Update cats-core, cats-free, cats-laws, ... to 2.2.0 (#163 by @scala-steward)
• Update discipline-scalatest to 2.0.1 (#161 by @scala-steward)
• Update scalacheck-1-14 to 3.2.2.0 (#160 by @scala-steward)
• Update sbt-doctest to 0.9.7 (#158 by @scala-steward)
• Update scalacheck-1-14 to 3.2.1.0 (#157 by @scala-steward)
• Update sbt-catalysts to 0.40 (#154 by @scala-steward)
• Update scalacheck-1-14 to 3.2.0.0 (#146 by @scala-steward)
• Update discipline-scalatest to 2.0.0 (#149 by @scala-steward)
• update sbt-catalysts and Scala versions (#150 by @larsrh)
• Update sbt to 1.3.13 (#147 by @scala-steward)
• Update sbt to 1.3.12 (#145 by @scala-steward)
• Update sbt to 1.3.11 (#144 by @scala-steward)
• Update scalacheck-1-14 to 3.1.2.0 (#142 by @scala-steward)
• Update sbt-header to 5.6.0 (#137 by @scala-steward)
• Update sbt to 1.3.10 (#132 by @scala-steward)
• Update sbt-header to 5.5.0 (#131 by @scala-steward)
• Update sbt to 1.3.9 (#130 by @scala-steward)
• Fix build by updating macro paradise and kind-projector (#129 by @joroKr21)
• Update Scala versions in Travis config (#127 by @joroKr21)
• Update discipline-scalatest to 1.0.1 (#124 by @scala-steward)
• Update scalacheck-1-14 to 3.1.1.1 (#123 by @scala-steward)
• Update scalacheck-1-14 to 3.1.1.0 (#122 by @scala-steward)
• Update sbt to 1.3.8 (#119 by @scala-steward)
• Update sbt-catalysts to 0.36 (#118 by @scala-steward)
• Update sbt-doctest to 0.9.6 (#117 by @scala-steward)
• Update discipline-scalatest to 1.0.0 (#116 by @scala-steward)
• Update test dependencies (#114 by @joroKr21)

Cats-tagless 0.9

Click here for the list of changes

Cats-tagless 0.8

Now available on 2.11, 2.12 and 2.13

3 API/Feature enhancements

• #55 update to scala 2.13 and latest cats by @kailuowang
• #50 Add Profunctor derivation macro by @joroKr21
• #49 Optimize typeclass instances for algebras without extra type params by @joroKr21

1 bug fixes

• #54 Add support for repeated (vararg) parameters by @joroKr21

cats-tagless 0.7

scala-meta annotations were replaced with scala-reflect ones.
Available on Scala 2.13.0-RC2

Cats-tagless 0.6

add support for Scala 2.13-RC1

v0.5

• override methods more conservatively by @joroKr21