Re: Getting a hole's relevant local binds?

Are you aware of hole fit plugins Sandy? Do they provide a nice API for you to use? This sounds like a cool and simple change anyway. What happens if you add this additional information using a source plugin or is that too late? Matt On Thu, Aug 22, 2019 at 5:24 PM Sandy Maguire wrote:

Following up on this, I've hacked in the changes locally, by setting `XVar GhcTc = [Name, Type]`, and filling it only for `HsVar`s that used to be `HsUnboundVar`s. The result is remarkable, as it allows for interactive proof search. I've got a proof of concept here: https://asciinema.org/a/FZjEIFzDoHBv741QDHfsU5cn8

I think the possibilities here warrant making the same change in HEAD. I'd be happy to send an MR if it seems likely to be merged.

Sandy

On Sat, Aug 17, 2019 at 6:27 PM Sandy Maguire wrote:

...

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

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