Scala: Classfile-level interoperability from 2.12 to 2.13? vice versa?

Asked Feb 01 '23 at 06:12

Active Feb 01 '23 at 06:24

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Can Scala 2.12 project can call methods in classfile compiled in Scala 2.13? and vice versa?

I'm going to updating our large Scala product from 2.12 to 2.13. The product is made of a few sbt project (currently all of these are built with 2.12) and projects are depending each other.

Can I update one of project upto 2.13 leaving other project as 2.12? or I must update all of project upto 2.13 at one time?

edited Feb 01 '23 at 06:24

Dmytro Mitin

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asked Feb 01 '23 at 06:12

Windymelt

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https://docs.scala-lang.org/overviews/core/binary-compatibility-of-scala-releases.html – Dmytro Mitin Feb 01 '23 at 06:21
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https://stackoverflow.com/questions/2053265/scala-binary-incompatibility-between-releases https://stackoverflow.com/questions/6244103/scala-backward-compatibility – Dmytro Mitin Feb 01 '23 at 06:24
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No, you can't. Each major version of the language is incompatible with the other ones. **Scala 3** will use a different model. – Luis Miguel Mejía Suárez Feb 01 '23 at 13:05
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Not sure what you mean by project but you can also cross compile to both 2.12 and 2.13 for a progressive upgrade. – Gaël J Feb 01 '23 at 19:38

Scala: Classfile-level interoperability from 2.12 to 2.13? vice versa?

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