page =
url = https://www.scala-lang.org
the scala programming language
Scala 3 is here!🎉🎉🎉
After 8 years of work, 28,000 commits, 7,400 pull requests, 4,100 closed issues – Scala 3 is finally out. Since the first commit on December 6th 2012, more than a hundred people have contributed to the project. Today, Scala 3 incorporates the latest research in type theory as well as the industry experience of Scala 2. We’ve seen what worked well (or not so well) for the community in Scala 2. Based on this experience we’ve created the third iteration of Scala – easy to use, learn, and scale.
Exciting new features: how to get started?
A lot of new features ended up in Scala 3, and you may wonder where you should start learning about all of it. The go-to place for learning Scala 3 is its documentation .
To get a taste of all the new features that went into Scala 3, you can have a look at the New in Scala 3 article . For a streamlined and more thorough introduction, see the Scala 3 Book . You can try Scala 3 online without installing anything on your machine via Scastie , or you can follow the Getting Started guide to install it on your machine.
One thing has changed completely in Scala 3 compared to Scala 2: it is macros. You can learn more about how they work in Scala 3 in the dedicated documentation .
If you are a seasoned user of Scala 2, chances are you have some projects you’d like to port from Scala 2 to Scala 3. You may find the Migration guide helpful. It outlines the compatibility story between Scala 2 and Scala 3: source compatibility, binary compatibility, changed and dropped features, metaprogramming.
And if you need any help in your Scala journey, you can find various resources to talk to fellow Scala users here .
Ecosystem
Who’s already on Scala 3? Which libraries can you already use? A great place to answer this question is Scaladex . Scaladex is an index of Scala libraries where you can explore the ecosystem by language version, platform or the type of job a library does. At the time of writing this article, there are 308 early adopter libraries on Scala 3, compared to 2597 Scala 2.13 libraries.
Releases and Guarantees in 3.x era
We intend to continue releasing every 6 weeks after 3.0.0, bumping the patch version every time we do so. A stable 3.0.x release will be preceded with 3.0.x-RC1 release candidate 6 weeks prior to such a stable release. Such patch releases will contain bug fixes for bugs affecting the respective minor version. Patch versions will be forward and backward compatible with each other over the source, binary and TASTy compatibilities.
Of course, we intend to continue the development of the language in ways other than bug fixing. New language features and standard library APIs will appear in future minor versions. As any addition in library APIs, these may break backward source compatibility in minor, rare ways. However, minor releases will not break backward binary or TASTy compatibility. Concretely, that means that libraries built with Scala 3.0.0 will keep working with Scala 3.x.y!
Library authors: Join our community build
Scala 3 now has a set of widely-used community libraries that are built against every nightly Scala 3 snapshot. At present, there are 67 projects included, and the number is growing rapidly. Join our community build to make sure that our regression suite includes your library.
Contributors
Thank you to all the contributors who made this release possible 🎉
All-time contributors who made Scala 3 a reality, according to
git shortlog -sn --no-merges 2308509d2651ee78e1122b5d61b798c984c96c4d..3.0.0
, are:
8661 Martin Odersky 3186 Nicolas Stucki 1435 Guillaume Martres 976 Dmitry Petrashko 797 Liu Fengyun 774 Felix Mulder 407 Allan Renucci 324 liu fengyun 324 Olivier Blanvillain 323 Martin Duhem 224 Aleksander Boruch - Gruszecki 204 Jamie Thompson 201 Krzysztof Romanowski 200 S ébastien Doeraene 172 Paolo G . Giarrusso 171 Bryan Abate 163 Aggelos Biboudis 162 Anatolii Kmetiuk 160 Anatolii 129 Robert Stoll 103 bishabosha 103 Filip Zyba Å‚a 101 Miles Sabin 82 Antoine Brunner 64 poechsel 64 Guillaume Raffin 62 Tom Grigg 61 Lan , Jian 55 noti0na1 54 Andrzej Ratajczak 51 odersky 50 Nikita Eshkeev 44 Guillaume R 37 St éphane Micheloud 34 Enno Runne 33 Sara Alemanno 31 Pawe Å‚ Marks 30 Ondrej Lhotak 29 Som Snytt 29 Abel Nieto 26 Ruslan Shevchenko 25 VladimirNik 23 Adrien Piquerez 22 Raphael Jolly 22 Jonathan Brachtha ̈user 22 Micha Å‚ Pa Å‚ka 20 vsalvis 20 Tobias Bordenca 20 Fengyun Liu 19 Martijn Hoekstra 19 Samuel Gruetter 19 Phil 19 Maxime Kjaer 18 Jendrik Wenke 17 Jason Zaugg 16 Krzysztof Romanwoski 16 Arnaud ESTEVE 15 Dale Wijnand 14 Jaemin Hong 13 gzoller 13 Vlad Ureche 12 Miron Aseev 12 Wojtek Swiderski 11 Yichen Xu 11 Grzegorz Bielski 10 Sebastian Nadorp 10 Jentsch 10 bjornregnell 10 Arnaud Esteve 10 Dmytro Melnychenko 10 Lionel Parreaux 9 Jonathan Brachth äuser 9 yu-croco 9 Jasper Moeys 8 Clemens Winter 8 Lukas Rytz 8 Varunram Ganesh 8 Oron Port 8 Reto Habl ützel 7 Ólafur P áll Geirsson 7 Varunram 7 benkobalog 7 Eugene Melekhov 6 jvican 6 Seth Tisue 6 Natsu Kagami 6 Thierry Treyer 6 Akhtiam Sakaev 6 Olivier ROLAND 6 Olafur Pall Geirsson 5 Nada Amin 5 Michael Pilquist 5 Ausmarton Zarino Fernandes 5 k0ala 5 Vlastimil Dort 5 Valthor Halldorsson 5 Travis Brown 5 Tomasz Godzik 5 Alex Merritt 5 Guillaume Mass é 5 Alexander Myltsev 5 Saloni Vithalani 5 Raphael Bosshard 5 Julien Richard - Foy 4 Micha Å‚ Gutowski 4 Sebastian Harko 4 fhackett 4 ysthakur 4 Ben Elliott 4 Raymond Tay 4 Ayush 4 Neeraj Jaiswal 4 Sarunas Valaskevicius 4 Lucas Burson 4 Dotty CI 4 Eric K Richardson 4 Vitor Vieira 4 Yevgen Nerush 4 Shane Delmore 4 Andrew Valencik 4 senia-psm 4 Minghao Liu 4 Matt D 'Souza 4 Eugene Yokota 4 Hanns Holger Rutz 4 Alex Zolotko 4 Georg Schmid 4 Chris Birchall 4 december32 4 Ingar Abrahamsen 3 Michal Gutowski 3 Gabriele Petronella 3 Gabi Volpe 3 Master - Killer 3 Uko 3 Timoth ée Floure 3 xuwei-k 3 Eric Loots 3 Enno 3 Edmund Noble 3 Saurabh Rawat 3 Albert Chen 3 Jakob Odersky 3 Daniel Li 3 Dani Rey 3 ansvonwa 3 duanebester 3 Alexandre Archambault 3 jerylee 3 kenji yoshida 3 Artur Opala 3 Adriaan Moors 3 Ankit Soni 3 Adam Fraser 3 Pavel Shirshov 3 Jo ão Pedro Evangelista 3 Andrea Mocci 3 Krzysztof Bochenek 3 Tudor Voicu 2 Tobias Schlatter 2 Alden Torres 2 AnEmortalKid 2 Andrew Zurn 2 Ara Adkins 2 Artsiom Miklushou 2 Ashwin Bhaskar 2 Aur élien Richez 2 Camila Andrea Gonzalez Williamson 2 Dvir Faivel 2 Fabian Page 2 FabioPinheiro 2 Francois GORET 2 Glavo 2 Greg Pevnev 2 Henrik Huttunen 2 Hermes Esp Ãnola Gonz ález 2 James Thompson 2 Jan Christopher Vogt 2 Jens Kat 2 Jim Van Horn 2 Jon Pretty 2 Lorand Szakacs 2 Luc Henninger 2 Lucas 2 Matthew Pickering 2 Matthias Sperl 2 Mikael Blomstrand 2 Nadezhda Balashova 2 Nikolay 2 Nikolay . Tropin 2 Patrik Mada 2 Philippus 2 Philippus Baalman 2 Rados Å‚aw Wa Å›ko 2 Rafal Piotrowski 2 Robert Soeldner 2 Roberto Bonvallet 2 Rodrigo Fernandes 2 Steven Heidel 2 Thiago Pereira 2 Tudor 2 William Narmontas 2 changvvb 2 dos65 2 esarbe 2 johnregan 2 lloydmeta 2 typeness 2 veera venky 2 xhudik 2 ybasket 1 Jyotman Singh 1 Justin du Coeur , AKA Mark Waks 1 Julien Jean Paul Sirocchi 1 Jo ão Pedro de Carvalho 1 rsoeldner 1 Jonathan Skowera 1 Jonathan Rodriguez 1 Jon - Anders Teigen 1 ruben 1 Alexander Slesarenko 1 Pierre Ricadat 1 Piotr Gabara 1 squid314 1 tOverney 1 Raj Parekh 1 Rajesh Veeranki 1 John Sullivan 1 Johannes Rudolph 1 Joan 1 Jimin Hsieh 1 Richard Beddington 1 Rick M 1 Rike - Benjamin Schuppner 1 tanaka takaya 1 Jean Detoeuf 1 tanishiking 1 tim-zh 1 Jarrod Janssen 1 Jan Rock 1 Sam Desborough 1 Jakub Koz Å‚owski 1 Sandro Stucki 1 Jacob J 1 Jaap van der Plas 1 Ivano Pagano 1 Ivan Youroff 1 Iltotore 1 Serhii Pererva 1 Igor Mielientiev 1 Ignasi Marimon - Clos 1 Simon Hafner 1 Simon Popugaev 1 Ian Tabolt 1 SrTobi 1 Stefan Zeiger 1 Stephane MICHELOUD 1 tokkiyaa 1 St éphane MICHELOUD 1 Herdy Handoko 1 Szymon Pajzert 1 Harrison Houghton 1 Taisuke Oe 1 yytyd 1 Harpreet Singh 1 Haemin Yoo 1 Timur Abishev 1 Grzegorz Kossakowski 1 Tobias Kahlert 1 0xf lotus 1 Greg Zoller 1 Tomas 1 George Leontiev 1 Florian Schmaus 1 zgrybus 1 Florian Cassayre 1 Ferhat Ayd ın 1 Umayah Abdennabi 1 Fedor Shiriaev 1 Dmitry Melnichenko 1 Dmitrii Naumenko 1 Vasil Vasilev 1 Victor 1 Deon Taljaard 1 Denis Buzdalov 1 Dean Wampler 1 David Hoepelman 1 Vykintas Narmontas ( William ) 1 Alexander Shamukov 1 DarkDimius 1 Daniel Reigada 1 Daniel Murray 1 Yilin Wei 1 Zolt án Elek 1 adpi2 1 aesteve 1 amanjpro 1 andreaTP 1 Damian Albrun 1 ayush 1 benkbalog 1 Csongor Kiss 1 Ciara O 'Brien 1 Carlos Quiroz 1 brunnerant 1 = 1 costa100 1 Bunyod 1 dieutth 1 AlexSikia 1 Brian Wignall 1 å¼ å¿—è±ª 1 felher 1 Brandon Elam Barker 1 fschueler 1 gan74 1 gnp 1 gosubpl 1 Bojan Dunaj 1 iroha168 1 Ben Hutchison 1 Albert Serrall é R Ãos 1 Batanick 1 Bartosz Krasi Å„ski 1 August Nagro 1 AngAng 1 Adam Trousdale 1 lpwisniewski 1 manojo 1 mentegy 1 mikhail 1 Mathias 1 msosnicki 1 Ang9876 1 Max Ovsiankin 1 Markus Kahl 1 Markus Hauck 1 Marc Karassev 1 Mads Hartmann 1 Lukas Ciszewski 1 Ang Hao Yang 1 Mike Samuel 1 Lucas Jen ß 1 Li Haoyi 1 Lanny Ripple 1 Mohuety Kirisame 1 Krzysiek Bochenek 1 phderome 1 Kevin Dre ßler 1 Keith Pinson 1 Kazuyoshi Kato 1 Kazuhiro Sera 1 Niklas Vest 1 Amadou CISSE 1 riiswa 1 Katrix 1 Karol Chmist 1 Ondra Pelech
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