Say Goodbye to Implicits - Contextual Abstractions in Scala 3

on YouTube ↗38m

" summary

Shows that Scala 3 removes the implicit keyword and replaces it with given/using, extension methods and a scala.Conversion class, with clearer import syntax and a new summon helper; demonstrates these changes across seven use cases (context, extensions, type classes, conversions, imports, anonymous givens, compiler errors) using side‑by‑side Scala 2 and Scala 3 code, two GitHub repos with runnable examples, and a migration path that lets Scala 2 and 3 coexist in 3.0/3.1.

AI-written summary · about

" chapters (14)

1. 0:00Introduction
2. 1:08Implicits in Scala 2
3. 3:55Contextual abstractions
4. 8:50Scala 3 implicits redesign
5. 10:56Providing context
6. 13:21Adding functionality
7. 16:12Type classes
8. 23:20Implicit conversions
9. 25:27Importing implicits
10. 27:32Mandatory names
11. 30:42Compiler errors
12. 32:50Migration to Scala 3
13. 33:56Improvements summary
14. 36:24Q&A

" related talks

• 46mFull Stack ScalaTrond Bjerkestrand · Scala.IO 2017
• 01h 31mScala.js WorkshopSébastien Doeraene · Scala World 2015
• 42mScala.js Semantics - and how they support performance and JavaScript interopSébastien Doeraene · Lambda World 2015
• 54mThe Things Scala js Does to Make Your Code FastSébastien Doeraene · Scala Days Berlin 2016
• 45mInlining anonymous functions with macrosErik Osheim · Pacific Northwest Scala 2013
• 49mScala js: getting the best of JavaScript and ScalaSébastien Doeraene · Devoxx Belgium 2017
• 31mScala for Javascript Kiddies; Javascript for Scala NerdsClint Tseng · Pacific Northwest Scala 2013
• 58mFun With ParsingDaniel Spiewak · LambdaConf Winter Retreat 2017