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# 0.4.3 (2022-01-21) | ||
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We're happy to announce the release of Scala Native v0.4.3, which brings support for Scala 3! | ||
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This release does also contain performance-critical bug fixes to performing operations on Strings, | ||
leading to significant improvement of regexes throughput. Furthermore it comes with improvements | ||
to the sbt plugin in the area of incremental compilation and implementation of some missing methods | ||
from Java standard library. | ||
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## Breaking changes in release 0.4.3 | ||
The minimal version of Scala 3 supported by Scala Native is 3.1.0, due to fatal blockers in Scala 3.0.x. | ||
In the future, when improved backward compatibility support in Scala 3.2 would implemented, Scala Native | ||
might be backported to the older version of the compiler. | ||
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### Changes to the main method resolving | ||
In the previous versions of Scala Native main entry point was always resolved based on the companion object defining the main method. | ||
This behaviour however lead to multiple issues in situations when an actual main method was introduced via inheritance. Because of that issue, | ||
build tools needed to always add `$` suffix to actual main class to make sure that entry method would be found. | ||
With the 0.4.3 release, Scala Native does generate static method forwarders in the same way as it is done in JVM and Scala.js. | ||
Build tools should make sure to no longer add `$` to the discovered main class name. | ||
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### Source compatibity of `stackalloc[T]` and `alloc[T]` methods | ||
No-param methods `scalanative.unsafe.stackalloc[T]` and `scalanative.unsafe.alloc[T]` were removed from Scala 3 `unsafe` package. | ||
In Scala 2 these methods have been deprecated and it is recommended to use empty-param variants of these methods instead, eg. `scalanative.unsafe.stackalloc[T]()`. | ||
This change was introduced due to changes of how does Scala 3 interpret source code as it could lead to dangerous, hard to debug, runtime errors. | ||
As an example call to `stackalloc[Byte](10)` in Scala 2 would result in allocating memory of size `10 * sizeof(Byte)`. In Scala 3 however, | ||
the given snippet would be interpreted as `stackalloc[Byte].apply(10)` which is still valid, but leads to allocating `1 * sizeof(Byte)` chunk of memory and | ||
accessing its 10th element, which would lead to undefined behaviour. | ||
More information can be found in [#2480](https://github.com/scala-native/scala-native/pull/2480) | ||
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## Known issues | ||
### Cannot create documentation using scaladoc in Scala Native sbt project | ||
When trying to generate documentation using Scaladoc for projects using Scala Native compilation would fail with an exception. | ||
This issue is common for most of the compiler plugins and was already fixed in Scala 3.1.1 compiler. As a workaround in Scala 3.1.0 we would recomend adjusting sbt build, by filtering out all `-Xplugin` settings from `Compile / doc / scalacOptions`. Workaround can be find in [this discussion](https://github.com/scala-native/scala-native/issues/2503#issuecomment-1005290906) | ||
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<table> | ||
<tbody> | ||
<tr> | ||
<td>Commits since last release</td> | ||
<td align="center">65</td> | ||
</tr> | ||
<tr> | ||
<td>Merged PRs</td> | ||
<td align="center">62</td> | ||
</tr> | ||
<tr> | ||
<td>Contributors</td> | ||
<td align="center">7</td> | ||
</tr> | ||
</tbody> | ||
</table> | ||
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## Contributors | ||
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Big thanks to everybody who contributed to this release or reported an issue! | ||
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``` | ||
$ git shortlog -sn --no-merges v0.4.2..v0.4.3 | ||
54 Wojciech Mazur | ||
5 Eric K Richardson | ||
2 Jan Chyb | ||
1 Anton Sviridov | ||
1 Kamil Podsiadło | ||
1 Lorenzo Gabriele | ||
1 Ruslan Shevchenko | ||
``` | ||
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## Merged PRs | ||
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## [v0.4.3](https://github.com/scala-native/scala-native/tree/v0.4.3) (2022-01-21) | ||
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[Full Changelog](https://github.com/scala-native/scala-native/compare/v0.4.2...v0.4.3) | ||
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**Merged pull requests:** | ||
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### Bug fixes | ||
- Initialize _String with `_` `Array[Char]` | ||
[\#2449](https://github.com/scala-native/scala-native/pull/2449) | ||
([lolgab](https://github.com/lolgab)) | ||
- Fix ARM64 MacOS varargs | ||
[\#2448](https://github.com/scala-native/scala-native/pull/2448) | ||
([keynmol](https://github.com/keynmol)) | ||
- Fix certain absolute file paths being shown as relative on Windows | ||
[\#2471](https://github.com/scala-native/scala-native/pull/2471) | ||
([jchyb](https://github.com/jchyb)) | ||
- Make `java.nio.MappedByteBuffer` JDK9+ compliant | ||
[\#2453](https://github.com/scala-native/scala-native/pull/2453) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Remove redundant coversion of `CharSequence` into `Array` in `Character.codePoint{at, before}` methods | ||
[\#2495](https://github.com/scala-native/scala-native/pull/2495) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
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### Native library | ||
- Adapt `unsafe` package for upcoming Scala 3 support | ||
[\#2454](https://github.com/scala-native/scala-native/pull/2454) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Enforce usage of empty parens variant of `stackalloc[T]` and `alloc[T]` in Scala 3 | ||
[\#2480](https://github.com/scala-native/scala-native/pull/2480) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
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### Standard Java library | ||
- Port URLDecoder from Scala.js | ||
[\#2506](https://github.com/scala-native/scala-native/pull/2506) | ||
([kpodsiad](https://github.com/kpodsiad)) | ||
- Allign implemenation of UTF-8 and UTF-16 charsets with Scala.js | ||
[\#2515](https://github.com/scala-native/scala-native/pull/2515) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- ProcessMonitor should not busy wait if there are no active processess | ||
[\#2518](https://github.com/scala-native/scala-native/pull/2518) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- System.properties define `os.arch` | ||
[\#2452](https://github.com/scala-native/scala-native/pull/2452) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Start adding JDK 11 support | ||
[\#2450](https://github.com/scala-native/scala-native/pull/2450) | ||
([ekrich](https://github.com/ekrich)) | ||
- Touch up NIO for Java 9+ | ||
[\#2455](https://github.com/scala-native/scala-native/pull/2455) | ||
([ekrich](https://github.com/ekrich)) | ||
- Add missing java.io.channels.Channels methods | ||
[\#2532](https://github.com/scala-native/scala-native/pull/2532) | ||
([jchyb](https://github.com/jchyb)) | ||
- Fix runtime errors in BigDecimal arithmetic operations | ||
[\#2534](https://github.com/scala-native/scala-native/pull/2534) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
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### Compiler plugin / NIR | ||
- Use encoded names for methods and fields in NIR | ||
[\#2458](https://github.com/scala-native/scala-native/pull/2458) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Define `Field` operation in NIR | ||
[\#2460](https://github.com/scala-native/scala-native/pull/2460) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Port NIR generation compiler plugin to Scala 3 | ||
[\#2462](https://github.com/scala-native/scala-native/pull/2462) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Adapt LazyVals to work in Scala Native | ||
[\#2465](https://github.com/scala-native/scala-native/pull/2465) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Port JUnit Plugin to Scala 3 | ||
[\#2467](https://github.com/scala-native/scala-native/pull/2467) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Introduce static scope and generate static method forwarders in Scala 3 | ||
[\#2472](https://github.com/scala-native/scala-native/pull/2472) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Generate static method forwarders in Scala 2 | ||
[\#2476](https://github.com/scala-native/scala-native/pull/2476) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Use public static main method forwarder as entry point | ||
[\#2481](https://github.com/scala-native/scala-native/pull/2481) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Improvements to generation and invocation of static methods | ||
[\#2489](https://github.com/scala-native/scala-native/pull/2489) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Fix #2504 - Use correct self value when generating Apply trees | ||
[\#2509](https://github.com/scala-native/scala-native/pull/2509) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Fix off by 1 `nir.Positions` produced in Scala 3 | ||
[\#2510](https://github.com/scala-native/scala-native/pull/2510) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Fix compilation errors when using lazy vals in quoted macros | ||
[\#2511](https://github.com/scala-native/scala-native/pull/2511) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Better error messages for `CFuncPtr.fromScalaFunction` | ||
[\#2512](https://github.com/scala-native/scala-native/pull/2512) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- When enabling reflective instantiation check base classess instead of parents | ||
[\#2521](https://github.com/scala-native/scala-native/pull/2521) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
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### sbt plugin | ||
- Store config cached fingerprints seperetly for each version of Scala | ||
[\#2516](https://github.com/scala-native/scala-native/pull/2516) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Add `-test` suffix to artifact path of test executables | ||
[\#2524](https://github.com/scala-native/scala-native/pull/2524) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
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### Linker | ||
- Make reachablity phase more user friendly | ||
[\#2469](https://github.com/scala-native/scala-native/pull/2469) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
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### Misc | ||
- Allow to define top-level extern definitons in Scala 3 | ||
[\#2496](https://github.com/scala-native/scala-native/pull/2496) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Add missing `Show` implementation for `Inst.LinktimeIf` | ||
[\#2513](https://github.com/scala-native/scala-native/pull/2513) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Implement time zone offset | ||
[\#2508](https://github.com/scala-native/scala-native/pull/2508) | ||
([ekrich](https://github.com/ekrich)) | ||
- Add Scala 2.13.8 to the build | ||
[\#2525](https://github.com/scala-native/scala-native/pull/2525) | ||
([WojciechMazur](https://github.com/WojciechMazur)) | ||
- Allow to compile Scala 2.11 scalalib with JDK 17 | ||
[\#2530](https://github.com/scala-native/scala-native/pull/2530) | ||
([rssh](https://github.com/rssh)) | ||
- Add Scala 3.1.1 to the build | ||
[\#2536](https://github.com/scala-native/scala-native/pull/2536) | ||
([WojciechMazur](https://github.com/WojciechMazur)) |
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.. toctree:: | ||
:maxdepth: 1 | ||
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0.4.3 | ||
0.4.3-RC2 | ||
0.4.3-RC1 | ||
0.4.2 | ||
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