Add plugin to copy binary files from the scala 2 artefacts #22480
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…22519) Scala 2 generates extension methods for Value Classes before pickling while Scala 3 generates them after. Now that we are working on compiling the Scala 2 stdlib with dotty (#22480), and therefore generating tasty files for the stdlib, we will have to distinguish between scala 2 that was unpickled and scala 2 code coming from tasty. For that, we currently have a flag, but it is not very useful apart from some very specific details where a workaround exists. This PR, removes one of 2 places where this flag is used. The [second place](https://github.com/scala/scala3/blob/aa9db1f682de634743af6d7077d5ed752430a487/compiler/src/dotty/tools/dotc/transform/YCheckPositions.scala#L51) will be removed once we inline the missing symbol in `Predef.scala` (after #22480) is merged.
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) When compiling under `-Ycompile-scala2-library`, we should consider the source code as Scala 2. This change will allow using Scala 2's erasure instead of Scala 3's. Related to #22480
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We will tackle the issue of generic signatures, and the logic to build the jar artifact in a subsequent PR |
hamzaremmal
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sjrd
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Mar 10, 2025
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Does it really require minor release or is it just to be on a safe side? Thinking about it in terms of Scala LTS |
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What would the LTS even do with this, if it were backported? |
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Yeah, I might have been overthinking things here. |
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First part of #22043
Supersedes #22399
Blocked by:
AnyValbetween Scala 2 and Scala 3 #22493AnyValunder-Ycompile-scala2-library#22533$init$trait constructors under-Ycompile-scala2-library#22496@publicInBinaryin 3.7.0 #22497@publicInBinarydoesn't have any effect on secondary constructors #22498Array[Null]andArray[Nothing]#22515-Ycompile-scala2-library#22520Not blocking, but related: