_______________________________________________I think Arnaud was talkin about ghc, i.e. compiler/, not about everything (incl libraries/base e.g.).
I tried, the PoC is at https://gitlab.haskell.org/ghc/ghc/-/merge_requests/11743
I needed to do `NoPolyKinds` in few modules (could give kind signature too, but NoPolyKinds were quicker).
Especially that hits hs-boot files.
By doing `default-language: GHC2021`, and going through modules with BangPatterns (and removing that, and other GHC2021 extensions), the diff stats are nice: 91 files changed, 24 insertions(+), 272 deletions(-)
- Oleg
On 8.12.2023 13.33, Andreas Klebinger via ghc-devs wrote:
On a whim tried enabling it by default but it failed first because GeneralizedNewtypeDeriving is incompatible with safe haskell
and once I disabled GeneralizedNewtypeDeriving it failed with some error about missmatched kinds.
I would welcome a patch doing this, but it's not a priority. Especially since it doesn't seem to be as simple as changing
the base language and removing some pragmas.
Am 07/12/2023 um 14:29 schrieb Arnaud Spiwack:
Indeed. I didn't realise the ambiguity in my wording.
I'd like for GHC to be built, with Hadrian, using GHC2021 as the base language.
On Thu, 7 Dec 2023 at 14:01, Tom Ellis <tom-lists-haskell-cafe-2023@jaguarpaw.co.uk> wrote:
On Thu, Dec 07, 2023 at 12:53:02PM +0000, Richard Eisenberg wrote:
> I think this is an excellent idea! So excellent, that we've already done it. :)
>
> When I try to compile with GHC 9.6.2 (what I have lying around), GHC2021 is in effect.
>
> Is there something different you were thinking of?
I think Arnaud meant that compilations of GHC's codebase itself should
use the GHC2021 setting.
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