Add missing cases Feature is not available

[mesudip]

Your environment

Which OS do you use?
Ubuntu
Which version of GHC do you use and how did you install it?
ghcup (ghc: 9.4.8)
How is your project built (alternative: link to the project)?

Which LSP client (editor/plugin) do you use?
VsCode
Which version of HLS do you use and how did you install it?

haskell-language-server version: 2.9.0.1 (GHC: 9.4.8) (PATH: /home/sudip/.ghcup/hls/2.9.0.1/lib/haskell-language-server-2.9.0.1/bin/haskell-language-server-9.4.8)

Have you configured HLS in any way (especially: a hie.yaml file)?
no.

What

Not long before in the era of ghc8, I could autocomplete on a case with all the cases . I have heavily relied on this feature. It made possible to work with libraries without understanding everything about a data type. In recent versions this feature has vanished making it compulsary to dive into library code

Current

In this screen all I have is Add EmptyCase It doesn't suggest Add missing cases options at all

[fendor]

Hi, thanks for the bug report!

Unfortunately, we had to remove that feature because it became unmaintainable due to GHC API changes. There is a huge paper trail of attempts to salvage it, see #2971, #3382, #3352, #3363, #3338, #3337 and many more.

It needs someone to take the time to essentially re-implement the feature for new GHC versions.