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Zero. People are actively aware of what happened in Python 2/3. The good thing is that Scala is a typed language, so they can a) provide tooling for migrating

Zero. People are actively aware of what happened in Python 2/3. The good thing is that Scala is a typed language, so they can a) provide tooling for migrating code b) compile things and get clear information about how much differences there are I think somebody said that necessary lines of change from Scala 2 -> Scala 3 should be below 0.1% to be acceptable.

jinst8gmi 10y ago
Odersky gave some details of language features being removed for Scala 3 in his talk and it seemed to be really obscure features I don't use anyway.
rbonvall 10y ago
Python may not be statically typed, but they still have an automated tool for migrating from 2 to 3.
- jonstewart 10y ago
  ...which covers only a subset of conversion issues and offers no guarantees.
  - outworlder 10y ago
    ... and that is different from Scala how?
    - Blaisorblade0 10y ago
      Unlike Scala, you can't figure out what Python code means correctly and statically — you have little idea what will be called by a function without running the code up to that point, so it's hard to do semantics-preserving refactorings. But Python changed Strings to use Unicode, and that's something everybody uses and that is insanely hard to refactor automatically even with types. For Dotty, instead, there are some hard-to-refactor-for changes, but they're in really advanced Scala things, so I expect they'll affect fewer users — mostly the kind of users who can write shapeless-like stuff.
platz 10y ago
Never give 0 for a statistical prediction.
enlait 10y ago
Oh you. Our codebase uses scala xml and macros; migration will be a major PITA.
- pyrophane 10y ago
  By the time this becomes an issue hopefully there will be a library that acts as a drop-in replacement for scala xml, at least.
- eugene_burmako 10y ago
  Author of Scala macros here. Here's a recent discussion on the future of macros in the brave new world of Dotty: https://www.reddit.com/r/scala/comments/4our5m/keynote_scalas_road_ahead_by_martin_odersky/d4gd439 https://www.reddit.com/r/scala/comments/4our5m/keynote_scala....
- merb 10y ago
  You will want to rewrite your macro's soon.
- doikor 10y ago
  You will most likely get a chance of upgrading your macros into scala.meta before dotty comes out. Also xml support as the scala-xml library will continue. Though as the xml literals are removed you have to use string interpolation (xml"<your><xml/>here</your>") which isn't as nice to use. (hopefully someone comes up with a nice DSL or something instead)
lmm 10y ago
How much money are you willing to lay down, at what odds?

jinst8gmi 10y ago

Odersky gave some details of language features being removed for Scala 3 in his talk and it seemed to be really obscure features I don't use anyway.

rbonvall 10y ago

Python may not be statically typed, but they still have an automated tool for migrating from 2 to 3.

jonstewart 10y ago
...which covers only a subset of conversion issues and offers no guarantees.
- outworlder 10y ago
  ... and that is different from Scala how?
  - Blaisorblade0 10y ago
    Unlike Scala, you can't figure out what Python code means correctly and statically — you have little idea what will be called by a function without running the code up to that point, so it's hard to do semantics-preserving refactorings. But Python changed Strings to use Unicode, and that's something everybody uses and that is insanely hard to refactor automatically even with types. For Dotty, instead, there are some hard-to-refactor-for changes, but they're in really advanced Scala things, so I expect they'll affect fewer users — mostly the kind of users who can write shapeless-like stuff.

platz 10y ago

Never give 0 for a statistical prediction.

enlait 10y ago

Oh you. Our codebase uses scala xml and macros; migration will be a major PITA.

pyrophane 10y ago
By the time this becomes an issue hopefully there will be a library that acts as a drop-in replacement for scala xml, at least.
eugene_burmako 10y ago
Author of Scala macros here. Here's a recent discussion on the future of macros in the brave new world of Dotty: https://www.reddit.com/r/scala/comments/4our5m/keynote_scalas_road_ahead_by_martin_odersky/d4gd439 https://www.reddit.com/r/scala/comments/4our5m/keynote_scala....
merb 10y ago
You will want to rewrite your macro's soon.
doikor 10y ago
You will most likely get a chance of upgrading your macros into scala.meta before dotty comes out. Also xml support as the scala-xml library will continue. Though as the xml literals are removed you have to use string interpolation (xml"<your><xml/>here</your>") which isn't as nice to use. (hopefully someone comes up with a nice DSL or something instead)

lmm 10y ago

How much money are you willing to lay down, at what odds?