Case split does not work

[largeword]

Hi, in PR, there is supposed a case automatically split up feature, but it does not show up in vscode, and I also don't know how to enable it manually.

So can someone guide me in the right direction to make it work?

[fendor]

Hi, thank you for your bug report!
The linked PR is unfortunately old and not relevant any more.

I am moving the issue to the main repo of Haskell Language Server, since that's the thing that takes care of such features.
Additionally, case split was dropped, I believe, mainly because there were issues with maintenance. See the plugin support for the hls-tactics-plugin: https://haskell-language-server.readthedocs.io/en/latest/support/plugin-support.html#current-plugin-support-tiers

[michaelpj]

I'm going to close as a duplicate of #2971