Dev maybe t

[turion]

See #39 (comment) and #37 (comment)

[turion]

Ah, the whole deriving via story doesn't work on older GHCs. Which makes this refactoring a bit pointless. If it's fine for you I'll leave this PR hanging round until maybe one day those older versions are dropped.

[snowleopard]

Hmm, unlocking DerivingVia seems like a pretty solid reason to drop support for older GHCs.

@vrom911 I can see that validation-selective currently supports GHC 8.4. How sad will you be if selective stops supporting it?

[snowleopard]

I went ahead and dropped support for older GHC versions, so we can now use DerivingVia!

Would you like to finish this PR? Happy to do this myself since I made some changes that might make rebasing this a bit tedious.

[turion]

Feel free to do it yourself, I can't come back to it in the next few weeks.

[Kleidukos]

@snowleopard I can probably make that kind of call regarding validation-selective in the future, since @tomjaguarpaw and I are maintainers for the lib now. :)

[snowleopard]

@Kleidukos Cool, thanks :) What's the last version of GHC that you support?

[tomjaguarpaw]

9.8

[snowleopard]

9.8

@tomjaguarpaw Oops, sorry, I meant to ask about the oldest supported version.

[tomjaguarpaw]

8.6, as confirmed by our test suite: https://github.com/kowainik/validation-selective/blob/a99a6610958090e55fa48ab936736471f1589691/.github/workflows/ci.yml#L24.

[snowleopard]

Got it, thanks! With #78 landing, selective supports the same version range, though I wonder if I should drop a few older versions. It's unclear if it's worth supporting so many versions.

[tomjaguarpaw]

What's the cost to supporting them?

[snowleopard]

What's the cost to supporting them?

CPP noise, CI time, and even just needing to think about them.

[tomjaguarpaw]

Yeah, it's hard to know whether the cost is worth paying without knowing how many people are continuing to use the package on older versions.