built-in and Scala 3 about splain

[lrytz]

Backporting them to scalac is now on my higher-priority list. In particular, those bugfixes integrated into 0.5.9-SNAPSHOT. I'll have to seek permission from @lrytz again.

Feel free to send a PR to scala/scala any time.

[tribbloid]

Features

That sounds like a good idea, but those features are dropped by @dwijnand for a reason (which I never bothered to ask). If you can get him or @lrytz to agree with you. It should be easy

Bugfixes

Backporting them to scalac is now on my higher-priority list. In particular, those bugfixes integrated into 0.5.9-SNAPSHOT. I'll have to seek permission from @lrytz again.

Scala 3

I don't think we have a roadmap for Scala 3 yet, considering that its metaprogramming features is still in progress. In addition, implicit error message of Scala 3 is already a vast improvement, and received much less complaint

[tribbloid]

@DuncanHills still no roadmap so far, the biggest problem I anticipated is the lack of a long-term interface for Scala3 compiler plugin, the only interface is for compile-time macros, which is not a bad place to start if we want to migrate splain features to Scala 3.

Regardless, there are works to be done ASAP to make the future migration easier:

• move to enable -Xsource:3 syntax to prepare for Scala 3 migration

Any help (suggestions/PR) will be greatly appreciated.