On Jun 1, 2022, at 5:54 AM, Spiwack, Arnaud <arnaud.spiwack@tweag.io> wrote:

Dear all,

I think that the objections raised so far were very minor. And the proposal is well justified. It's not a big enough proposal that we should weigh our options carefully for too long. I propose we accept promptly.

On Wed, Mar 30, 2022 at 10:20 AM Spiwack, Arnaud <arnaud.spiwack@tweag.io> wrote:

I realise that I hadn't opined here.

I'm in favour.

On Thu, Jan 13, 2022 at 11:51 PM Richard Eisenberg <lists@richarde.dev> wrote:

That's a really good point. Do you want to raise it on the PR?

Richard

> On Jan 13, 2022, at 4:56 PM, Vladislav Zavialov (int-index) <vlad.z.4096@gmail.com> wrote:
>
> Can we guarantee erasure? Is `Warning flag msg => t` the same operationally as just `t`?
>
> The proposal does not say that. And it’s not what I would’ve expected from a constraint. Yet it’s something I expect from a warning.
>
> I am not comfortable with a design where adding a custom warning, the purpose of which is to improve developer experience, comes at a cost of potential performance regression.
>
> This isn’t a trade off that users of GHC should be facing.
>
> - Vlad
>
>> On 14 Jan 2022, at 00:47, Richard Eisenberg <lists@richarde.dev> wrote:
>>
>> I vote to accept.
>>
>> Thanks,
>> Richard
>>
>>> On Jan 13, 2022, at 11:19 AM, Tom Harding <i.am.tom.harding@gmail.com> wrote:
>>>
>>> Hi all,
>>>
>>> As Joachim noted, #454 is extracted from Adam’s previous efforts with the Unsatisfiable constraint proposal (which has since been accepted). In short, it covers an interface for custom warnings, and I can already think of plenty of ways I’d use it. I’d therefore like to recommend acceptance, and discuss any issues or changes.
>>>
>>> Thanks,
>>> Tom
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