[ghc-steering-committee] Please review #632: introduction of new language editions (inc. GHC2024)

[Simon Peyton Jones]

I'm in support. I have added a suggested edit.

On Wed, 9 Apr 2025 at 10:34, Simon Marlow via ghc-steering-committee <
ghc-steering-committee at haskell.org> wrote:

> Committee: I'm proposing we accept #632, which will change the policy for
> new language editions such that new GHC versions will use the latest
> language edition by default if one is not specified. GHC 9.10 didn't do
> this, but we'll aim to do it in the future.
>
> Not specifying an explicit language edition is a relatively rare situation
> - in particular Cabal always sets the language edition. The notable cases
> where the default language edition will be used is when invoking "ghc" or
> "ghci" directly from the shell; see the proposal for more details.
>
>  If you have comments on the proposal, please discuss on github:
> https://github.com/ghc-proposals/ghc-proposals/pull/632
>
> I think we should be able to reach consensus pretty quickly on this one,
> shall we say 2 weeks for comments?
>
> Cheers
> Simon
>
> On Tue, 8 Apr 2025 at 09:17, Adam Gundry <adam at well-typed.com> wrote:
>
>> Dear Committee,
>>
>> I propose to amend the process for introducing new language editions,
>> such that GHC always uses the latest language edition by default. In
>> particular this would change the default language edition to GHC2024 (it
>> currently remains GHC2021):
>>
>> https://github.com/ghc-proposals/ghc-proposals/pull/632
>>
>> https://github.com/adamgundry/ghc-proposals/blob/ghc2024-amendment/proposals/0372-ghc-extensions.rst#breaking-changes
>>
>> https://github.com/adamgundry/ghc-proposals/blob/ghc2024-amendment/proposals/0613-ghc2024.rst#implementation-plan
>>
>> I'd like to invite Simon Marlow to be the shepherd. (Originally I was
>> shepherding this amendment myself, in the hope that it would be a quick
>> amendment in time for GHC 9.10, but that was clearly a forlorn hope!)
>>
>> Please guide us to a conclusion as outlined in
>> https://github.com/ghc-proposals/ghc-proposals#committee-process
>>
>> 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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