Dotty compatibility

[larsrh]

This likely requires a ton of work.

For starters, typelevel/cats#2041 needs to be done first.

[cquiroz]

I'd be interested to tackle this one. Can we get an algebra release with Dotty support?

[larsrh]

2.1.0 is out

[cquiroz]

Thanks

[cquiroz]

I started cracking at this and it's going to be quite a bit of changes given the amount of macros.

One of the first things I'd like to do is to get rid of all warnings and move to munit

Could I drop support for 2.12 to make the conversion to dotty easier, it would let me get rid of most warnings and scala-collection-compat

[larsrh]

Fine with me, I'd say.

[cquiroz]

I'm still doing some progress with this. A difficulty is the amount of macros spire has so a first round of a port will only do macros where strictly necessary. In cases where a macro is only done for performance reason it will be done later.

One of the macros that seem to need to be ported is Checked
https://github.com/typelevel/spire/blob/master/macros/src/main/scala/spire/macros/Checked.scala#L170

If you think not please let me know and how should I replace it

Note that this bug was a showstopper but it has been fixed upstream
scala/scala3#12708

[SethTisue]

not sure if @bishabosha's https://github.com/bishabosha/spire-scala3 has anything useful here — perhaps you've already surpassed it

[cquiroz]

Thanks for the tip. I managed to compile core but still have troubles porting some of the macros

We'd need to make sure the tests run too

[cquiroz]

Got the Checked.scala macro ported. This lets me know fully compile core in scala 3.
I'm not very familiar with macros but tests are passing. I'd appreciate feedback if you want to take a look

https://gist.github.com/cquiroz/8c6825aae439230f2850fc2eb93410d0

[armanbilge]

#1067.