[ghc-steering-committee] #632: Phased introduction of GHC2024

Simon Peyton Jones simon.peytonjones at gmail.com
Thu Feb 15 09:15:37 UTC 2024

I'm ok with this proposal.  The whole concept of a default language seems a
bit flaky to me, if we are going to start warning any time someone doesn't
explicitly specify an explicit addition.  While this is settling down,
causing minimum disruption is good.


On Thu, 15 Feb 2024 at 08:50, Adam Gundry <adam at well-typed.com> wrote:

> Dear committee,
> In #632, I propose amending the GHC2024 proposal to specify that the
> default language used by ghc/ghci when run directly will remain GHC2021
> for now, since changing to GHC2024 is not backwards compatible. (This
> does not affect Cabal packages either way, since Cabal specifies its own
> default.)
> https://github.com/ghc-proposals/ghc-proposals/pull/632
> https://github.com/adamgundry/ghc-proposals/blob/ghc2024-amendment/proposals/0613-ghc2024.rst#introduction-of-ghc2024
> On the discussion thread, some people expressed a preference that GHC
> should default to the latest language edition anyway. There is also
> Richard's suggestion of wider changes of approach in #636. However,
> given that the GHC 9.10 fork date is fast approaching, introducing
> GHC2024 but not making it the default seems like the best short-term
> solution to me. We can always reassess our approach to this for future
> releases as part of the wider discussion.
> If you object to the proposed approach, please speak up ASAP. Otherwise
> I plan to merge in a week or so.
> Cheers,
> Adam
> --
> Adam Gundry, Haskell Consultant
> Well-Typed LLP, https://www.well-typed.com/
> Registered in England & Wales, OC335890
> 27 Old Gloucester Street, London WC1N 3AX, England
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