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Merge pull request #2627 from dotty-staging/anounce-0.1.2
0.1.2 series announcement
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‎docs/blog/_posts/2017-05-31-first-dotty-milestone-release.md

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---
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layout: blog-page
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title: Announcing Dotty 0.1.2-RC1, a major step towards Scala 3
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author: Dmytro Petrashko
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authorImg: /images/petrashko.jpg
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---
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Today, we are excited to release Dotty version 0.1.2-RC1. This release
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serves as a technology preview that demonstrates new language features
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and the compiler supporting them.
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<!--more-->
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## Why is this important?
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_Dotty_ is the project name for a language and compiler that
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is slated to become Scala 3.0. This is an ongoing development,
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transparently developed as open source software. The Dotty project
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started more than 4 years ago. It reached a major milestone in 2015 by
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achieving
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[bootstrap](http://dotty.epfl.ch/blog/2015/10/23/dotty-compiler-bootstraps.html),
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that is, showing that the new compiler could compile itself. Today we
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have reached another milestone with this first release of the
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codebase. Developments will not stop here, but they will in the future
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all be part of regular time-based releases.
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## How can you try it out?
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You have several alternatives: use the `sbt-dotty` plugin, get a standalone
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installation, or try it online on [Scastie].
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### sbt
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Using sbt 0.13.13 or newer, do:
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```
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sbt new lampepfl/dotty.g8
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```
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This will setup a new sbt project with Dotty as compiler. For more details on
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using Dotty with sbt, see the
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[example project](https://github.com/lampepfl/dotty-example-project).
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### Standalone installation
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Releases are available for download on the _Releases_
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section of the Dotty repository:
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https://github.com/lampepfl/dotty/releases
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We also provide a [homebrew](https://brew.sh/) package that can be installed by running
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```
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brew install lampepfl/brew/dotty
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```
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### Scastie
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[Scastie], the online Scala playground,
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supports Dotty.
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You can try it out there without installing anything.
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# What’s in the 0.1.2-RC1 technology preview?
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This technology preview demonstrates new language features planned for Scala 3:
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- [Intersection Types](http://dotty.epfl.ch/docs/reference/intersection-types.html)
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- [Union Types](http://dotty.epfl.ch/docs/reference/union-types.html)
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- [Trait Parameters](http://dotty.epfl.ch/docs/reference/trait-parameters.html)
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- [Enumerations](http://dotty.epfl.ch/docs/reference/enums.html)
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- [Algebraic Data Types](http://dotty.epfl.ch/docs/reference/adts.html)
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- [By-Name Implicits](http://dotty.epfl.ch/docs/reference/implicit-by-name-parameters.html)
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We also ship with tools that help you try out the Dotty platform:
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- [IDE features for Visual Studio Code](http://dotty.epfl.ch/docs/usage/ide-support.html)
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- [sbt support, including retro-compatibility with Scala 2](https://github.com/lampepfl/dotty-example-project)
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See here for the full [release notes](http://dotty.epfl.ch/docs/release-notes/0.1.2.html).
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## Release schedule
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Starting from this release, we are adopting a time-based release schedule:
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- Nightly builds will be published, for those wanting to be at the forefront of
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development.
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- Every 6 weeks, a release candidate will be cut based on the latest nightly build.
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- Every 6 weeks, the latest release candidate becomes a release.
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At the end of 6 weeks, the milestone will be promoted to a stable release.
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See here for the full [version number explanation](http://dotty.epfl.ch/docs/usage/version-numbers.html).
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## What are the next steps?
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Over the coming weeks and months, we plan to work on the following topics:
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- [Integrate Local optimizations developed in Dotty linker](https://github.com/lampepfl/dotty/pull/2513);
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- [Add Language-level support for HMaps and HLists](https://github.com/lampepfl/dotty/pull/2199);
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- [Port global optimizations from Dotty linker](https://github.com/lampepfl/dotty/pull/1840).
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If you want to get your hands dirty with any of this, now is a good
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moment to get involved! Join the team of contributors, including
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Martin Odersky ([@odersky](https://twitter.com/odersky))
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Dmitry Petrashko ([@DarkDimius](https://twitter.com/DarkDimius)),
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Guillaume Martres ([@smarter](https://github.com/smarter)),
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Felix Mulder ([@felixmulder](https://twitter.com/felixmulder)),
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Nicolas Stucki ([@nicolasstucki](https://github.com/nicolasstucki)),
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Liu Fengyun ([@liufengyun](https://github.com/liufengyun)),
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Olivier Blanvillain ([@OlivierBlanvillain](https://github.com/OlivierBlanvillain)),
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and others!
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## Library authors: Join our community build
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Dotty now has a set of libraries that are built against every nightly snapshot.
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Currently this includes scalatest, squants and algebra.
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Join our [community build](https://github.com/lampepfl/dotty-community-build)
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to make sure that our regression suite includes your library.
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To get started, see <https://github.com/lampepfl/dotty>.
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[Scastie]: https://scastie.scala-lang.org/?target=dotty

‎docs/docs/release-notes/0.1.2.md

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---
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layout: doc-page
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title: 0.1.2 release notes
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---
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0.1.2 will be the first public release of Dotty.
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Being the first one, these notes are incomplete.
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This document is a work in progress until 0.1.2-final is released.
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These notes are up-to-date based on 0.1.2-RC1 and will be updated
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with changes that happen during the RC stabilization cycle.
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# Required Java Version
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Dotty 0.1.2 targets Java 8. We don't have plans to add support for earlier versions of Java.
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# IDE support for Dotty
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# Reporting Bugs / Known Issues
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Please [file](https://github.com/lampepfl/dotty/issues) any bugs you encounter. If you’re unsure whether something is a bug,
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please ask on the Dotty [gitter channel](https://github.com/lampepfl/dotty).
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# Dotty Doc
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Dotty has added support for Dotty Doc.
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Actually, the dotty documentation site [http://dotty.epfl.ch/docs/](http://dotty.epfl.ch/docs/) is generated by it.
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Looks nice, doesn’t it?
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#Other implemented features:
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This release ships with the following features:
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- TASTY support by [@odersky], [@xeno-by] and [@darkdimius] [\[1\]][1]
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- HK-types support by [@odersky], [@smarter] and [@darkdimius] [\[2\]][2]
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- Intersection and Union Types by [@odersky] [\[3\]][3] [\[4\]][3]
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- Enumerations by [@odersky] [\[4\]][4] [\[5\]][5] [\[6\]][6]
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- Implicit By-Name Parameters by [@odersky] [\[7\]][7]
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- Miniphases-based design by [@darkdimius], [@odersky] and [@olhotak] [\[8\]][8]
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- `@static` methods support by [@darkdmius] [\[9\]][9]
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- Non-blocking lazy vals by [@darkdimius] [\[10\]][10]
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- JVM code emission by [@magarciaEPFL] and [@darkdimius] [\[11\]][11]
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- Efficient multi-dimensional array allocation by [@darkdimius] [\[12\]][12]
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- Default-method based trait composition [@odersky] and [@darkdimius] [\[13\]][13] [\[14\]][14]
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- Trait parameters by [@odersky] [\[15\]][15]
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- Working contravariant implicits by [@odersky] [\[16\]][16]
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- Option-less pattern matching by [@odersky], [@darkdimius] and [@OlivierBlanvillain] [\[17\]][17]
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- SAM-based anonymous functions by [@magarciaEPFL], [@darkdimius] and [@retronym] [\[18\]][18]
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- Pattern matching support by [@darkdimius] [\[19\]][19]
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- Value classes support by [@smarter] and [@darkdimius] [\[20\]][20]
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- Pattern matching exhaustivity checks by [@liufengyun] [\[21\]][21]
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- Tailrec optimization by [@darkdimius] [\[22\]][22] [\[23\]][23]
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- Language server protocol implementation by [@smarter] [\[24\]][24]
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- VS code plugin by [@smarter] [\[24\]][24]
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- Vulpix: new test-suite driver by [@felixmulder] that replaces partest by [@vsalvis] [\[25\]][25]
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- Java parser by [@olhotak] [\[26\]][26]
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- Local optimizations(-optimise) by [@darkdimius] and [@OlivierBlanvillain] [\[27\]][27]
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- sbt support by [@smarter] [\[28\]][28]
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- DottyDoc by [@felixmulder] [\[29\]][29]
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- Implicit Function Types by [@odersky] [\[30\]][30]
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- Phantom Types by [@nicolasstucki] [\[31\]][31]
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- Functions with more than 22 parameters by [@odersky] [\[32\]][32]
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- Inline keyword by [@odersky] [\[33\]][33]
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[@odersky]: https://twitter.com/odersky
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[@DarkDimius]: https://twitter.com/DarkDimius
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[@smarter]: https://github.com/smarter
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[@felixmulder]: https://twitter.com/felixmulder
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[@nicolasstucki]: https://github.com/nicolasstucki
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[@liufengyun]: https://github.com/liufengyun
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[@OlivierBlanvillain]: https://github.com/OlivierBlanvillain
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[@olhotak]: https://plg.uwaterloo.ca/~olhotak/
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[@retronym]: https://github.com/retronym
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[@xeno-by]: https://github.com/xeno-by
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[@vsalvis]: https://github.com/vsalvis
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[@magarciaEPFL]: https://github.com/magarciaEPFL
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[1]: https://docs.google.com/document/d/1h3KUMxsSSjyze05VecJGQ5H2yh7fNADtIf3chD3_wr0/edit
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[2]: https://infoscience.epfl.ch/record/222780?ln=en
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[3]: http://dotty.epfl.ch/docs/reference/intersection-types.html
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[4]: http://dotty.epfl.ch/docs/reference/union-types.html
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[5]: http://dotty.epfl.ch/docs/reference/adts.html
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[6]: http://dotty.epfl.ch/docs/reference/desugarEnums.html
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[7]: http://dotty.epfl.ch/docs/reference/implicit-by-name-parameters.html
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[8]: https://infoscience.epfl.ch/record/228518
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[9]: http://docs.scala-lang.org/sips/pending/static-members.html
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[10]: http://docs.scala-lang.org/sips/pending/improved-lazy-val-initialization.html
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[11]: http://magarciaepfl.github.io/scala/
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[12]: https://github.com/lampepfl/dotty/commit/b2215ed23311b2c99ea638f9d7fcad9737dba588
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[13]: https://github.com/lampepfl/dotty/pull/187
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[14]: https://github.com/lampepfl/dotty/pull/217
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[15]: http://dotty.epfl.ch/docs/reference/trait-parameters.html
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[16]: https://github.com/lampepfl/dotty/commit/89540268e6c49fb92b9ca61249e46bb59981bf5a
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[17]: https://github.com/lampepfl/dotty/pull/174
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[18]: https://github.com/lampepfl/dotty/pull/488
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[19]: https://github.com/lampepfl/dotty/pull/174
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[20]: https://github.com/lampepfl/dotty/pull/411
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[21]: https://github.com/lampepfl/dotty/pull/1364
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[22]: https://github.com/lampepfl/dotty/pull/1227
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[23]: https://github.com/lampepfl/dotty/pull/117
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[24]: https://github.com/lampepfl/dotty/pull/2532
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[25]: https://github.com/lampepfl/dotty/pull/2194
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[26]: https://github.com/lampepfl/dotty/pull/213
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[27]: https://github.com/lampepfl/dotty/pull/2513
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[28]: https://github.com/lampepfl/dotty/pull/2361
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[29]: https://github.com/lampepfl/dotty/pull/1453
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[30]: http://dotty.epfl.ch/docs/reference/implicit-function-types.html
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[31]: https://github.com/lampepfl/dotty/pull/2136
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[32]: https://github.com/lampepfl/dotty/pull/1758
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[33]: http://dotty.epfl.ch/docs/reference/inline.html
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# Contributors
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The Dotty team and contributors have closed 750 issues and have merged a total of 1258 pull requests.
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Concretely, according to
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```
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git ls-tree -r -z --name-only HEAD -- |egrep -z -Z -E '\.(scala)$'| xargs -0 -n1 git blame --line-porcelain |grep "^author "|sort|uniq -c|sort -nr
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```
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71 people contributed code, tests, and/or documentation to Dotty 0.1.2-RC1.
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The following people have contributed to this release:
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| commits | blame lines | Name |
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|---------|-------------|-----------------------------|
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| 4346 | 82017 | Martin Odersky |
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| 1288 | 83070 | Dmitry Petrashko |
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| 19 | 35382 | Samuel Gruetter |
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| 826 | 20148 | Felix Mulder |
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| 567 | 10454 | Guillaume Martres |
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| 136 | 5311 | liu fengyun |
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| 189 | 4449 | Nicolas Stucki |
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| 21 | 3717 | Sébastien Doeraene |
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| 30 | 1711 | Ondrej Lhotak |
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| 33 | 1094 | Enno Runne |
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| 47 | 735 | Olivier Blanvillain |
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| 4 | 480 | Valthor Halldorsson |
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| 7 | 343 | Aleksander Boruch-Gruszecki |
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| 25 | 220 | VladimirNik |
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| 3 | 186 | Enno |
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| 8 | 143 | Clemens Winter |
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| 16 | 133 | Jason Zaugg |
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| 3 | 116 | Miron Aseev |
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| 4 | 109 | Shane Delmore |
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| 5 | 100 | Alexander Myltsev |
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| 5 | 96 | Abel Nieto |
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| 1 | 92 | Dmitry Melnichenko |
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| 22 | 88 | Jonathan Brachthäuser |
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| 5 | 87 | Guillaume Massé |
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| 20 | 75 | vsalvis |
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| 2 | 64 | Tobias Schlatter |
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| 4 | 51 | Ólafur Páll Geirsson |
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| 4 | 49 | Sebastian Harko |
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| 2 | 48 | Andrew Zurn |
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| 3 | 44 | jvican |
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| 1 | 43 | Jarrod Janssen |
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| 1 | 43 | Igor Mielientiev |
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| 2 | 35 | Thiago Pereira |
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| 5 | 32 | Martijn Hoekstra |
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| 1 | 26 | Bartosz Krasiński |
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| 1 | 24 | Adam Trousdale |
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| 10 | 22 | Aggelos Biboudis |
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| 12 | 20 | Paolo G. Giarrusso |
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| 1 | 17 | Jon-Anders Teigen |
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| 17 | 16 | Vlad Ureche |
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| 1 | 16 | Jyotman Singh |
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| 4 | 15 | Lucas Burson |
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| 1 | 12 | Markus Hauck |
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| 3 | 11 | Varunram Ganesh |
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| 2 | 11 | Reto Hablützel |
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| 3 | 10 | Allan Renucci |
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| 4 | 9 | Sarunas Valaskevicius |
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| 2 | 9 | Nikolay.Tropin |
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| 1 | 9 | Csongor Kiss |
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| 2 | 7 | dos65 |
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| 2 | 6 | Varunram |
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| 6 | 5 | Nada Amin |
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| 1 | 4 | ruben |
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| 1 | 4 | Kazuyoshi Kato |
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| 1 | 3 | Jonathan Rodriguez |
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| 1 | 3 | andreaTP |
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| 1 | 1 | AlexSikia |
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| 3 | 0 | Edmund Noble |
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| 2 | 0 | jvican |
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| 3 | 0 | Allan Renucci |
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| 3 | 0 | Senia-psm |
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| 2 | 0 | Lukas Rytz |
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| 2 | 0 | Jan Christopher Vogt |
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| 2 | 0 | Raymond Tay |
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| 1 | 0 | Matthias Sperl |
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| 1 | 0 | Herdy Handoko |
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| 1 | 0 | Grzegorz Kossakowski |
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| 1 | 0 | George Leontiev |
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| 1 | 0 | Sandro Stucki |
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| 1 | 0 | Adriaan Moors |
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| 1 | 0 | Simon Hafner |

‎docs/docs/usage/version-numbers.md

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---
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layout: doc-page
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title: "Version numbers"
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---
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Dotty uses multiple schemes for version numbering.
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Stable releases have version numbers of the form `0.${x}.${y}`, where `x` is a main version and `y` is a bug-fix update id.
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Release candidates version numbers have the form `0.${x}.${y}-RC${z}`.
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Every 6 weeks, the latest release candidate is promoted to stable and becomes version `0.${x}.${y}`.
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The release candidates let library authors test their code in advance of each
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release. Multiple release candidates may be released during each 6 weeks
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period to fix regressions and are differentiated by `z`.
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Nightlies have version numbers of the form `0.${x}.${y}-bin-${date}-${sha}-NIGHTLY`.
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Every 6 weeks, the latest nightly is promoted to release candidate becomes version `0.${x}.${y}-RC1`.

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