SCALA 3



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 6, 2012, over a hundred people have contributed to the project. Scala 3 today includes the latest research in type theory as well as industry experience from Scala 2. We saw what works well (or not so well) for the community in Scala 2. Based on this experience, we created the third iteration of Scala - a simple use, study and scale.



Exciting new features: where to start?



Scala 3 has a ton of new features and you might be wondering where to start learning all of this. The best place to learn Scala 3 is in its documentation .



To get a taste of all the new features that are included in Scala 3, you can read the article " What 's New in Scala 3" . For a simplified and more detailed introduction, see the Scala 3 Book . You can try Scala 3 online without installing anything on your computer through Scastie , or you can follow the getting started guide to get it installed on your computer.



One thing has changed completely in Scala 3 from Scala 2: macros. You can read more about how they work in Scala 3 in the dedicated documentation .



If you are an experienced Scala 2 user, chances are you have projects that you want to migrate from Scala 2 to Scala 3. You will find the migration guide useful . It describes the history of compatibility between Scala 2 and Scala 3: native compatibility, binary compatibility, modified and removed functions, metaprogramming.



And if you need help with your Scala journey, you can find various resources here to talk to other Scala users.



Ecosystem



Who is already using Scala 3? What libraries can you already use? A great place to answer this question is Scaladex . Scaladex is a Scala Libraries Index where you can explore the ecosystem by language version, platform, or the type of work the library is doing. At the time of this writing, there are 308 early adopter libraries in Scala 3 compared to 2,597 in Scala 2.13.



Releases and warranties in the 3.x era



We intend to continue releasing updates every 6 weeks after 3.0.0, each time we upgrade the patch. The 3.0.x stable release will be preceded by the 3.0.x-RC1 release candidate 6 weeks prior to the stable release. Such patch releases will contain bug fixes that affect the corresponding minor version. The patch versions will be forward and backward compatible with each other in terms of source compatibility, binary and TASTy compatibility.



Of course, we intend to continue the development of the language not only by correcting errors, but also in other ways. New language features and standard library APIs will appear in the next additional versions. As with any addition to library APIs, they can break the backward compatibility of the source code in minor, rare ways. However, minor releases do not break backward binary or TASTy compatibility. Specifically, this means that libraries built with Scala 3.0.0 will continue to work with Scala 3.xy!



Library Authors: Join Our Community



Scala 3 now has a set of widely used public libraries that are created for every night snapshot of Scala 3. It currently has 67 projects and is growing rapidly. Join our community build to make sure our regression package includes your library.



Contributors



Thanks to all contributors who made this release possible



According to git shortlog -sn --no-merges 2308509d2651ee78e1122b5d61b798c984c96c4d..3.0.0, the contributors who made Scala 3 a reality are:



list
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 Sébastien Doeraene

172 Paolo G. Giarrusso

171 Bryan Abate

163 Aggelos Biboudis

162 Anatolii Kmetiuk

160 Anatolii

129 Robert Stoll

103 bishabosha

103 Filip Zybała

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 Stéphane Micheloud

34 Enno Runne

33 Sara Alemanno

31 Paweł Marks

30 Ondrej Lhotak

29 Som Snytt

29 Abel Nieto

26 Ruslan Shevchenko

25 VladimirNik

23 Adrien Piquerez

22 Raphael Jolly

22 Jonathan Brachthäuser

22 Michał Pałka

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 Brachthäuser

9 yu-croco

9 Jasper Moeys

8 Clemens Winter

8 Lukas Rytz

8 Varunram Ganesh

8 Oron Port

8 Reto Hablützel

7 Ólafur Páll 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 Massé

5 Alexander Myltsev

5 Saloni Vithalani

5 Raphael Bosshard

5 Julien Richard-Foy

4 Michał 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 Timothée 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 João 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 Aurélien 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 Espínola González

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 Radosław Waśko

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 João 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 Kozłowski

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 Stéphane 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 0xflotus

1 Greg Zoller

1 Tomas

1 George Leontiev

1 Florian Schmaus

1 zgrybus

1 Florian Cassayre

1 Ferhat Aydın

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 Zoltán Elek

1 adpi2

1 aesteve

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1 Damian Albrun

1 ayush

1 benkbalog

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1 Ciara O'Brien

1 Carlos Quiroz

1 brunnerant

1 =

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1 Bunyod

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1 felher

1 Brandon Elam Barker

1 fschueler

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1 Bojan Dunaj

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1 Ben Hutchison

1 Albert Serrallé Ríos

1 Batanick

1 Bartosz Krasiński

1 August Nagro

1 AngAng

1 Adam Trousdale

1 lpwisniewski

1 manojo

1 mentegy

1 mikhail

1 Mathias

1 msosnicki

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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 Jenß

1 Li Haoyi

1 Lanny Ripple

1 Mohuety Kirisame

1 Krzysiek Bochenek

1 phderome

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1 Keith Pinson

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