Getting a hole's relevant local binds?

[Sandy Maguire]

Simon, my reasoning here is that holes are the only place GHC will mention
relevant bindings. I'd definitely prefer to put all of the relevant local
bindings in scope for _every_ HsVar, but that seemed less  amenable to
being merged :)

On Wed, Aug 28, 2019 at 4:56 AM Simon Peyton Jones <simonpj at microsoft.com>
wrote:

> how receptive would y'all be to a patch that puts the `TcLclEnv`, or
> something similar inside `XUnboundVar GhcTc`.
>
>
>
> That sounds plausible.   But is an unbound-var the only place an
> editor/IDE tooling might want to get its hands on such a thing?   ie would
> that solve your problem, but not the next person’s?
>
>
>
> Also note that you could easily build up a list of all the in-scope Ids
> simply by gathering them from the tree as you walk inwards.  There’s no
> actual need for a new function -- although I can see it might be more
> convenient.
>
>
>
> Simon
>
>
>
> *From:* ghc-devs <ghc-devs-bounces at haskell.org> *On Behalf Of *Sandy
> Maguire
> *Sent:* 18 August 2019 01:28
> *To:* ghc-devs at haskell.org
> *Subject:* Getting a hole's relevant local binds?
>
>
>
> Hi all,
>
>
>
> I'm trying to get my hands on the relevant local binds (as reported by ghc
> in the presence of a type hole) for editor tooling support. Tracing the
> code suggests that these things come from the `TcLclEnv`, but afaict, all
> remnants of `TcLclEnv` are thrown away by the time we get a
> `TypecheckedModule`.
>
>
>
> Am I mistaken in this? If not, how receptive would y'all be to a patch
> that puts the `TcLclEnv`, or something similar inside `XUnboundVar GhcTc`.
> This way editors would have an easy means of getting their hand on whatever
> is in scope at the site of a hole, without resorting to parsing error
> messages.
>
>
>
> Cheers,
>
> Sandy
>
>
>
> --
>
> I'm currently traveling the world, sleeping on people's couches and doing
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-- 
I'm currently traveling the world, sleeping on people's couches and doing
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