[ghc-steering-committee] Proposal #638: Prefix form for MkSolo# (Recommend Accept)

[Simon Peyton Jones]

Well this proposal deepens the commitment to an exception for Solo and
Solo#.   But I'm not really objecting, just asking.

Simon

On Tue, 12 Mar 2024 at 09:34, Arnaud Spiwack <arnaud.spiwack at tweag.io>
wrote:

> In favour.
>
> Simon: I don't think your objection pertains to this particular proposal
> amendment, does it? Rather it's a further change to the original proposal
> that you'd like to see.
>
> On Mon, 11 Mar 2024 at 11:48, Simon Peyton Jones <
> simon.peytonjones at gmail.com> wrote:
>
>> Thanks Matthias
>>
>> I'm generally supportive, but please see my comment exploring a minor
>> alternative
>> <https://github.com/ghc-proposals/ghc-proposals/pull/638#issuecomment-1988147639>
>> .
>>
>> Simon
>>
>> On Sat, 9 Mar 2024 at 00:12, Matthías Páll Gissurarson <mpg at mpg.is>
>> wrote:
>>
>>> Greetings committee!
>>>
>>> In [proposal #638](
>>> https://github.com/ghc-proposals/ghc-proposals/pull/638),
>>> @int-index proposes that we introduce a prefix form of MkSolo#, and
>>> apparent oversight in proposal #475 [Non-punning list and tuple syntax](
>>> https://github.com/ghc-proposals/ghc-proposals/pull/475).
>>>
>>> Previously, you would write `(# a #)` to construct a `Solo# a`.
>>> But the question is: what would be the prefix form of this constructor?
>>> It can't be `(# #)`, because this is already defined as a constructor of
>>> `Unit#`!
>>>
>>> This amendment proposes the `MkSolo#` constructor, having us write
>>> `MkSolo# a` for the prefix form. The discussion seems unanimous, after care
>>> was taken to clarify that a fully applied `MkSolo# a` would still be pretty
>>> printed as `(# a #)`, avoiding programmer confusion.
>>>
>>> It seems quite straightforward to me, so:
>>>
>>> I recommend accepting this amendment to #475.
>>>
>>>
>>> --
>>> --  Matthías Páll Gissurarson <http://mpg.is/>
>>> _______________________________________________
>>> ghc-steering-committee mailing list
>>> ghc-steering-committee at haskell.org
>>> https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee
>>>
>> _______________________________________________
>> ghc-steering-committee mailing list
>> ghc-steering-committee at haskell.org
>> https://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-steering-committee
>>
>
>
> --
> Arnaud Spiwack
> Director, Research at https://moduscreate.com and https://tweag.io.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/ghc-steering-committee/attachments/20240312/411c98f6/attachment-0001.html>