[ghc-steering-committee] Proposal #302: Multiway lambda: new extension or not?

Simon Peyton Jones simonpj at microsoft.com
Wed Sep 15 12:00:26 UTC 2021


Vitaly, Eric, Tom, Alejandro
As Joachim says, we need to make a decision on the LambdaCase flag issue.  It's a judgement call, so let's just vote.
Here is the voting sheet<https://docs.google.com/document/d/1NDXk5kKcLtkqhkSNESAC9jVrBn3yqS_Qe1vacAIKnDs/edit?usp=sharing>.  I have filled in votes from Simon, myself, Joacim, Richard, Vlad.  But four of us (in the to: line) have not expressed an opinion. Could you do so please, in the next day or two?  It should take you 5 minutes.
Thanks
Simon






PS: I am leaving Microsoft at the end of November 2021, at which point simonpj at microsoft.com will cease to work.  Use simon.peytonjones at gmail.com instead.  (For now, it just forwards to simonpj at microsoft.com.)



|  -----Original Message-----

|  From: ghc-steering-committee <ghc-steering-committee-

|  bounces at haskell.org> On Behalf Of Joachim Breitner

|  Sent: 14 September 2021 08:39

|  To: ghc-steering-committee at haskell.org

|  Subject: Re: [ghc-steering-committee] Proposal #302: Multiway lambda:

|  new extension or not?

|

|  Hi,

|

|

|  on the multiway-lambda story, we have voted to add \cases alongside

|  \case. But one open question is still: Do we

|   (1) add -XLambdaCases (which would imply -XLambdaCase) or

|   (2) simply expand the meaning of -XLambdaCase.

|

|  On the Github thread at

|  https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgith<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  ub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a8831943459<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  9cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6376720<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  20597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDY<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  UKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fghc-proposals%2Fghc-proposals%2Fpull%2F302%23issuecomment-895080031&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597687362%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=2ySitCA%2FT1uUznezDYUKIO8g2ImLMKlnxm1OpKOXKZg%3D&reserved=0>

|  we see that I lean towards (1), but SPJ leands towards (2).

|

|  It doesn't matter that much, but we need to make a decision. Can I

|  please get some opinions from the rest of the committee on this point?

|

|  Cheers,

|  Joachim

|

|

|  --

|  Joachim Breitner

|    mail at joachim-breitner.de<mailto:mail at joachim-breitner.de>

|

|  https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.j<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|  oachim-<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|  breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|  434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C63<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|  7672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|  2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec4<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|  21KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0<https://nam06.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.joachim-breitner.de%2F&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=unmdYu9zUy00ec421KJYmL9I2ZO%2BlIx5J9cLw27GnmI%3D&reserved=0>

|

|

|  _______________________________________________

|  ghc-steering-committee mailing list

|  ghc-steering-committee at haskell.org<mailto:ghc-steering-committee at haskell.org>

|  https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmail<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>

|  .haskell.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fghc-steering-<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>

|  committee&data=04%7C01%7Csimonpj%40microsoft.com%7Cea35a8831943459<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>

|  9cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6376720<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>

|  20597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMz<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>

|  IiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>

|  soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0<https://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%7Cea35a88319434599cce708d97752bd08%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C637672020597697367%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=TG3t%2Fw1kFLk173SoM5soHU39BlAPv76TY%2B9FNetaLJs%3D&reserved=0>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-steering-committee/attachments/20210915/8de9c47c/attachment-0001.html>


More information about the ghc-steering-committee mailing list