Sorry for late comment.
Am 12.06.2016 um 14:24 schrieb Joachim Breitner:
> Am Samstag, den 11.06.2016, 12:12 -0700 schrieb Michael Burge:
> I propose allowing an optional single extra comma at the end in module
> declarations, record declarations, record constructors, and list
> constructors:
>
> module Example (
> module Example,
> SomeConstructor(..),
> ) where
>
> data SomeConstructor = SomeConstructor {
> foo :: Int,
> bar :: Int,
> }
>
> baz :: SomeConstructor -> SomeConstructor
> baz x = x {
> foo = 5,
> bar = 10,
> }
>
> qux :: [ Int ]
> qux = [
> 1,
> 2,
> 3,
> ]
>> What do you think?
>
> For the module header, this is already possible.
>
> For the term language, it unfortunately clashes with things like
> TupleSections.
Tuples haven't been mentioned by the OP. Indeed, extra commas don't make
any sense for tuples so let's just forget about them.
> I believe this has been discussed a few times in the past, e.g.
> https://mail.haskell.org/pipermail/haskell-prime/2013-May/003833.html
And, like here, people concentrate on the red herring 'tuple sections'.
To repeat (and slightly flesh out) the proposal:
Allow an optional single extra comma at the end in:
* module import and export lists
* record declarations
* record constructors
* record updates
* list constructors
I can't see anything problematic with that.
Cheers
Ben
--
"Make it so they have to reboot after every typo." ― Scott Adams
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