There is a (stale) ghc-proposal for that,
https://github.com/ghc-proposals/ghc-proposals/pull/357

So there is!  Thank you.

Gergo: would you like to take over this proposal, revise it if necessary in the light of the comments, and submit it?

Simon

On Fri, 6 May 2022 at 10:08, Oleg Grenrus <oleg.grenrus@iki.fi> wrote:

There is a (stale) ghc-proposal for that,
https://github.com/ghc-proposals/ghc-proposals/pull/357

- Oleg

On 6.5.2022 12.04, Simon Peyton Jones wrote:
> Dear devs
>
> At the moment the INLINEABLE pragma means "capture my right-hand side,
> regardless of how big it is, so that it can be type-class-specialised,
> including in other modules".  But it /also /says "feel free to inline me".
>
> Some users (eg Gergo) want to say NOINLINE on some functions. But for
> these they'd still like to generate type-class-specialised versions. 
> After all, if we aren't going to inline them, specialising is the next
> best thing.
>
> But we have no way to say both "specialise me" and "don't inline me",
> because you can't say both INLINEABLE and NOINLINE.  (That would look
> silly.)
>
> I think we should probably just bite the bullet and add a
> SPECIALISABLE pragma, /orthogonal to INLINE/NOINLNE/, which say
> "capture my right-hand side, regardless of how big it is, so that it
> can be type-class-specialised, including in other modules".  It
> behaves exactly like INLINEABLE except that  you can specify it along
> with INLINE/NOINLINE.
>
> Any thoughts?  Do you think this needs a GHC proposal?
>
> See #21036 <https://gitlab.haskell.org/ghc/ghc/-/issues/21036#note_407930>
>
>
> Simon
>
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