Currently Haskell98 and Haskell2010 are a special kind of LANGUAGE option that can't be reversed, and later ones override earlier ones. I think we should treat GHC2021 in the same way.
Fine with me. I'd just like to see it specified in the proposal.
Simon
From: ghc-steering-committee
Is there `-XNoGHC2021`, and if so what does it do? Proposal should say.
The meta-proposal says This language version can be used as a language extension (with the sole effect of implying other language extensions), but also as a language versions in places where Haskell98 or Haskell2010 is valid (e.g. via Cabal's default-language field). When ghc is used without an explicit language choice, the latest GHC20xx known to GHC is used. This applies in particular to uses of ghci. and I'd hope that this answers such technical details (and that the GHC devs will resolve obscure corner cases sensibly)? It seems that ghc-8.8 does not know -XNoHaskell2010, so I would assume that there is no -XNoHaskell2010 either. If there is a nice use case for that, I think adding this a feature doesn't need committee involvement, and can be done by GHC contributers. Currently Haskell98 and Haskell2010 are a special kind of LANGUAGE option that can't be reversed, and later ones override earlier ones. I think we should treat GHC2021 in the same way. Relatedly, at least one community member asked for a way to opt-into the current "default" mode of GHC (which is neither Haskell98 nor Haskell2010, e.g. it has NondecreasingIndentation). He suggested simply calling that GHC2020. Whether that happens, and if it's called GHC2020 or OldDefault or something else, I'd also trust the GHC devs. GHC2020 seems reasonable to me. Cheers Simon Cheers, Joachim -- Joachim Breitner mail@joachim-breitner.demailto:mail@joachim-breitner.de http://www.joachim-breitner.de/https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cf30806e7570b4ca94cb408d8bbc1f425%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637465789560190043%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=nbmafO%2BrNiq6NfdEF42Sxn%2FzEVbSC753Lg%2FSYJu%2B0T4%3D&reserved=0 _______________________________________________ ghc-steering-committee mailing list ghc-steering-committee@haskell.orgmailto:ghc-steering-committee@haskell.org https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committeehttps://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmail.haskell.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fghc-steering-committee&data=04%7C01%7Csimonpj%40microsoft.com%7Cf30806e7570b4ca94cb408d8bbc1f425%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637465789560200041%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000&sdata=39P%2FPjuR2DDFWLZAZo8RsIEB1nH6rJdYRcmQUDF%2Bxfw%3D&reserved=0