v0.18.0

This is the first release in the v0.18.x series of Spire. It is published for Scala 2.13 and 3.1+ with Scala.js 1.8+ and Scala Native 0.4. Note that it is not binary compatible with v0.17.0.

Leading up to this release there were three milestones: v0.18.0-M1, v0.18.0-M2, and v0.18.0-M3. Their release notes are summarized below.

Scala 3 support

A big round of applause for @cquiroz for his multi-month, multi-PR effort to cross-compile Spire for Scala 3, including porting "unportable" macros. A heroic effort, which culminated in #1067. Also special thanks to @bishabosha for porting the cfor macros in #1111.

Performance

Scala 3 does not support specialization for type parameters, so code relying on this feature takes a severe performance hit. Otherwise, benchmarks suggest that performance on Scala 3 roughly matches Scala 2.

The complete benchmark suite run for 2.13 vs 3 is available here: #1067 (comment).

Migration guide

• parentheses: these are now omitted for 0-arity (empty-parens) methods with no side-effects.
• Checked macros: very nearly ported in whole (!), except for tryOrReturn which can be replaced with try / catch and return.
• Literals: all ported to Scala 3, except radix literals.

Deprecated and/or unported features

UnboundSyntax and Machinist macros, Fpf, and Auto macros. Some of these could be ported in a later release, but don't count on it!

Algebra v2.8.0

Several typeclasses that originated in Spire were ported to Algebra in its v2.7.0 release. While updating in #1115 we removed the following typeclasses from Spire and replaced them with type aliases pointing to the Algebra implementations.

• GCDRing
• EuclideanRing
• DivisionRing
• Signed / SignedAdditiveCMonoid/ SignedAdditiveAbGroup
• TruncatedDivision / TruncatedDivisionCRing
• Field

Note that in Algebra Signed no longer extends Order. So in many places an additional Order constraint has to be added where previously Signed was sufficient.

User-facing PRs

• Dotty by @cquiroz in #1067
• Drop support for scala 2.12 by @cquiroz in #978
• Updated version info on microsite by @pinguinson in #1046
• Deprecate NoImplicit in favor of NotGiven by @cquiroz in #1098
• Improve docs by @i10416 in #1095
• rename traversable to iterable by @i10416 in #1107
• hygiene macros by @i10416 in #1109
• Update to algebra 2.7.0 by @armanbilge in #1115
• ensure fastForInline does not make closures by @bishabosha in #1111
• Don't assume NRoot[Real] is perfect by @kschwarz1116 in #1173
• Cross-build for Native by @armanbilge in #1180
• Add allButCats syntax by @armanbilge in #1181

Behind-the-scenes

• Switch to github actions by @cquiroz in #956
• Switch to github actions by @larsrh in #963
• Switch to munit by @cquiroz in #968
• Fewer warnings by @cquiroz in #974
• scalafmt by @cquiroz in #982
• Type ascriptions by @cquiroz in #1027
• Update sbt and libs by @cquiroz in #1029
• Use the new cross-project builder command by @danicheg in #1048
• Migrate on mdoc by @danicheg in #1047
• Rename master to main by @danicheg in #1045
• Use new SBT syntax in CI pipeline by @danicheg in #1062
• Replace cfor with fastFor by @armanbilge in #1077
• Dotty diff minimizing by @armanbilge in #1079
• Use sbt-ci-release by @cquiroz in #1081
• Update bundle by @armanbilge in #1082
• Set the version scheme by @cquiroz in #1085
• Remove version.sbt by @cquiroz in #1087
• Update scalafmt to 3.0.6 by @armanbilge, @cquiroz in #1084
• fix publish workflow by @i10416 in #1078
• Fix ci by @i10416 in #1093
• Show previousStableVersion on site if snapshot by @armanbilge in #1094
• Remove some unreachable code by @cquiroz in #1099
• Test on jdk-17 by @cquiroz in #1100
• migrate caliper to jmh by @i10416 in #1122
• Rename fastFor back to cfor by @armanbilge in #1137
• Migrate to sbt-typelevel by @armanbilge in #1138
• Migrate to sbt-typelevel-site by @armanbilge in #1142
• update benchmarks by @i10416 in #1128
• Remove unused sbt plugins by @armanbilge in #1161
• format headers with brackets properly by @kschwarz1116 in #1175
• Reduce min tests for native in various scalacheck suites by @armanbilge in #1182

New Contributors

• @danicheg made their first contribution in #1048
• @pinguinson made their first contribution in #1046
• @armanbilge made their first contribution in #1077
• @i10416 made their first contribution in #1078
• @bishabosha made their first contribution in #1111
• @kschwarz1116 made their first contribution in #1173
• @typelevel-steward made their first contribution in #1177

Thank you wonderful contributors!!

Full Changelog: v0.17.0...v0.18.0