Proposal: deprecate Prelude.read

[Carter Schonwald]

I agree with emily david and ed

Bringing readMaybe into prelude plus adding call stack info to read are the
Sane path forward to improving Haskell.

 Deprecating read, insofar as how ghc deprecation works, is a lotta pain
for no real hao.

On Thu, Oct 14, 2021 at 11:47 PM Edward Kmett <ekmett at gmail.com> wrote:

> A variant of this that I would support would be to bring readMaybe into
> Prelude from Text.Read for a good long time, and *then* to deprecate read.
> As it stands, read and the almost equally ugly readIO are the only Prelude
> facing ways for a user to really consume a Read instance, so losing read
> there is a heck of a blow to usability without a replacement being in place
> with an established pattern of usage.
>
> -Edward
>
> On Thu, Oct 14, 2021 at 11:16 PM Emily Pillmore <emilypi at cohomolo.gy>
> wrote:
>
>> NOPE.
>>
>>
>> On Thu, Oct 14, 2021 at 8:31 PM, Fumiaki Kinoshita <fumiexcel at gmail.com>
>> wrote:
>>
>>> It is a partial function that does not provide a call stack, and it's
>>> very slow too.
>>>
>>> I propose deprecating Prelude.read <http://prelude.read/>. Adding
>>> deprecation should not break anything substantial because Hackage rejects
>>> -Werror (application code using -Werror is likely to experience a lot more
>>> breakage anyway, and I'd say it's their fault if it fails to build due to a
>>> use of read along with -Werror).
>>>
>>> Of course those who still want to use Prelude.read
>>> <http://prelude.read/> can totally ignore warnings. I believe this
>>> proposal is not that controversial.
>>>
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>>
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