[ghc-steering-committee] Proposal #167 (Deprecated Entities): Request for comments

[Iavor Diatchki]

Hello,

this seems quite reasonable and I think we should accept it.    I don't
have a strong preference on if this is positional or not.   If it is
positional, it may be nice to associate it with a specific delcaration, so
that you don't have to write the name twice.  OTOH, I also see values in
the ability to put all deprecation pragmas in one place, rather than
sprinkling them throughout a declaration.

-Iavor

On Fri, Feb 1, 2019 at 6:58 AM Vitaly Bragilevsky <bravit111 at gmail.com>
wrote:

> Dear Committee,
>
> I was asked to shepherd the proposal #167 (Deprecated Entities,
> https://github.com/nineonine/ghc-proposals/blob/depr-entities/proposals/0000-deprecated-entities.rst).
> It is proposed to extend DEPRECATED pragma with the two specifiers to
> disambiguate deprecating named type-level and value-level things. Simon
> suggested another alternative to make DEPRECATED pragmas positional (in
> consistency with the deprecating modules). I like the positional
> alternative more, as it enables more fine-grained control over deprecated
> entities and can be extended to deprecating unnamed entities (like type
> class instances). It seems the author is okay with rewriting the proposal,
> but the current proposal is already implemented.  So, the question is: do
> we want it quick or good? I am not ready to answer this question and come
> up with the recommendation on the proposal yet.
>
> Please, comment on the following issues: a) which form of the DEPRECATED
> pragma you prefer, b) do you see any potential drawbacks of the positional
> form, c) are there any caveats with deprecating instances. Your comments
> are very welcome either here or on GitHub (
> https://github.com/ghc-proposals/ghc-proposals/pull/167).
>
> Thanks,
> Vitaly
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