Go-to-definition/go-to-references for count.index/count

[radeksimko]

Background

As part of implementing #860 in hashicorp/hcl-lang#134 we took a shortcut and decided not to treat count.index as an actual reference origin and similarly not treat count attribute as a target.

This has some implications on the UX and some future work

Go To Definition

While the benefit isn't as obvious in a simple and short config, there are cases where a module or a resource may not fit on the screen. Secondly, as a user I'd just expect "go-to-definition" to always work for any reference, if that reference points somewhere in the code.

Go To References

Similar as above, there can be a number of count.index references and it would be reasonable to expect "go-to-references" to just work in that context.

Config Resolution

There are features which will rely on our ability to resolve references within the config, for example:

• Consider exposing evaluated config as data to code lenses hcl-lang#132
• Show interpolated expression values on hover #495
• Reflect default values in (module & core) completion and hover #956

Proposal

TODO

[github-actions]

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