sublimehq
[Scala] Add support for Scala 3
Scala 3 is currently in its final release candidate, and a release is expected within about a month. While the existing syntax mode does work just fine for the subset of Scala 3 which overlaps with Scala 2, there are a large number of constructs which have been added to the language which are not fully supported. A non-exhaustive list follows:
given,then,as, and similar new keywords (most of which are "soft" keywords that only parse as such in the proper context)- Significant indentation (similar to Python; has a major impact on auto-indentation hints)
- New class definition syntax (related to the above)
- Mix-fix method definition syntax
- Higher-rank types (e.g.
[A] =>> (A, A => Int) => Int) - Context-bounds included within types (e.g.
Monoid[A] ?=> (A, A) => A) - New meaning for wildcards (e.g.
*in imports,?in types, etc) - New macro syntaxes (related to the new keywords problem)
The list goes on. There's a lot of stuff to update here. I plan to get to this eventually, but my calendar is a bit crunchy right now, so I'm putting this issue out here so that others can be aware of the need.
According to https://dotty.epfl.ch/docs/reference/syntax.html it looks like a good candidate for SBNF (see: https://lib.rs/crates/sbnf)
Maybe! I sincerely doubt though that the reference you linked is definitive. The Scala 3 parser is hand-written. Also the whitespace-sensitivity is not well captured by the core grammar.
Any updates on this? Would be super nice to have some updated syntax highlight for Scala3!
BTW the syntax doc have been moved to https://docs.scala-lang.org/scala3/reference/syntax.html
Would love to get support for Scala3. If I can assist in any way, I'd be happy to. 👍
Would love to get support for Scala3. If I can assist in any way, I'd be happy to. 👍
~~@kevinsjoberg Use this PR by following the ReadMe instructions and checking out this branch (or code that includes it), and then endorse or comment.~~ Oops
PR? We only have this feature request issue, atm.
Would need some Scala guy with ST syntax knowledge to contribute.
My mistake. I looked at the first post and saw the list of things to do and imagined it was a list of thing that were done. 😊 Did not look at the Issue/PR icon at all or the fact that there was no tab for file changes.
@djspiewak I'd be happy to put some money into getting the Scala syntax updated if you're up for it. Feel free to reach out if you're interested. 🙂
I took some time to modify the default syntax highlighting and add support for some of the new Scala 3 syntax/keywords. My repo is at https://github.com/mrdziuban/sublime-scala-3-syntax, and you can see a diff of the Scala.sublime-syntax file here: https://github.com/mrdziuban/sublime-scala-3-syntax/compare/base-build-4169...upd-build-4169
It's far from complete, but even just having the new keywords highlighted and having enums be included when I search for symbols has been really nice. I don't plan to add support for significant indentation/optional braces, but I'm definitely open to contributions or forks!
