Any plan to support scala 3?

[alessandrocandolini]

The project is currently cross published for scala 2.12 and 2.13. Are there any plans to start supporting scala3?
Importing meteor in scala3 projects using cross(CrossVersion.for3Use2_13) is not an option, because dependencies have different incompatible artefacts for scala2 and scala3

[d2a4u]

hi, sorry for the late reply. Unfortunately there isn't a plan for upgrading from scala2 to scala3 yet. I've tried to do it but it seems to require a lot more effort that expected. This is the branch that I'm working on. Please feel free to raise a new PR or contribute to this one if you would like to. Thanks.

[mhzajac]

Do you have more detail on the difficulties you've run into upgrading? From a fresh clone, with Scala 3.2.2, if I remove kind-projector and use the -rewrite -source 3.0-migration compiler flags, it compiles and the tests pass.

[d2a4u]

@mhzajac integration tests are failing for scala 3 and that is the only blocker atm. It looks like this bug but I might be wrong. I haven't managed to figure out why. Any suggestions are welcomed. Thanks.

[mhzajac]

Ah, that looks right. I no longer see that error using dotty/main, but it's not officially published yet ☹️

[marko-asplund]

Any news on Scala 3 support @d2a4u ?
3.3.1-RC1 includes dotty#16882, so it should now be easy to validate the hypothesis that the IT failures were caused by that issue.

[marko-asplund]

Update: please see #301 (comment)

[marko-asplund]

PR #343 updated to Scala v3.3.1-RC7.
Please have a look @d2a4u and others.

[marko-asplund]

Scala v3.3.1 was released on 2023-09-08.
Any chance of someone looking at this issue again?
Please also check out #343.

[viswanath7]

We've waited too long for Scala 3 support. Please help!

[d2a4u]

hi, sorry for the long delay. I've not been able to spend as much time as I did before on this project. Version 2.0.0 has been released with Scala 3 support. With this release, I've dropped supports for scanamo because when I started working on Scala 3 support, scanamo hadn't supported it yet so the removal was needed to unblock meteor's work. I will consider re-adding it in the future. Thank @marko-asplund for helping with the Scala 3 support release.

[marko-asplund]

Great to see meteor v2 released with Scala 3 support! 🥳 Thanks @d2a4u ! 🙇