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SWG 2023-04-17

Meeting URL: https://meet.jit.si/StableHaskellMeetBiWeekly

Previous meeting notes

Agenda & Notes

New items to discuss

Short-Term Action Items From Previous

  • David: Conversations about GHC nightlies

  • Ben: Add definition of tech preview on website and/or wiki mentioned during March 20th meeting

    • David: Is this better for wiki or user's guide? Suggests user's guide.
    • Trevis asks: Does the user's guide need a glossary?
    • Resolution: Do the quick thing - add a glossary page to user's guide

  • Chris: Add to mtl migration guide a way to work with prior and new versions

    • Keeping track of decision history and rationale would be useful, not just for mtl but in general.
    • Desired properties: shows how to write code that works with multiple versions (not just the new one), contains the rationale for why this change was made and is worth it

  • Trevis: Examine TH users for possibility of th-abstraction

    • In progress, but not ready to report yet

  • Trevis: Ask Aeson for backport of TH issue disussed last time

In progress projects

Updates

  • Bulletin discussed previously

    • Previously holding the token: Chris

  • GHC warning policy document as discussed previously

    • Previously holding the token: Chris
    • This has come up in the community
    • From previous meeting notes:
      • Maybe we should articulate, in GHC's breakage policy, that new warnings may be added that warn about code that currently doesn't warn; and hence -Werror will force authors to make some change to their .cabal file.
      • Wcompat: new warnings are by default added to -Wcompat. You can switch on -Werror and -Wno-error-compat (or something like that). We should explain that.
      • GHC migration guide could list new warnings.
      • Tom will add the link to the Core Libraries warning policy
      • Chris will draft a proposal -- essentially, part of a new GHC breakage policy doc.

  • Creating and maintaining a set of hlint rules to promote stability

    • Previously holding the token: Trevis
    • Opened issue asking if we can write rules for typeclasses.

  • GHC API discussed previously

    • Previously holding the token: David

  • Update on Language/compiler features to help stability, specifically #4879

    • Previously holding the token: David + Simon
    • Now being done by IOG internship!

New for next week

Action items

  • Recruit for this group
  • Rebalance meetings for task progress vs task identification

Discussion items