Support conditional expressions (condition ? true : false)

[radeksimko]

Background

Terraform supports conditional expressions. For example:

var.a != "" ? var.a : "default-a"

The language server currently doesn't support these, which means that completion is not provided:

• within the condition before or after the operator (such as !=), nor
• within the truthy part (after ?), nor
• within the falsey part (after :)

It also means that we don't report valid expressions (such as traversals) anywhere within the conditional.

Proposal

Completion

TODO

Hover

Support the expression so that value can be interpolated as part of #495 and hover works for the expressions within a conditional. i.e. for var.a or "default-a in the following example

var.a != "" ? var.a : "default-a"

Semantic Tokens

TODO

[radeksimko]

This was implemented in hashicorp/hcl-lang#326 with some follow-up issues linked from there.

[github-actions]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.
If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.