> But that requires compiler-as-a-service, and GHC is not. And writing your own analyser for a language is quite a task. Yep. Haskell-language-server is very n

> But that requires compiler-as-a-service, and GHC is not. And writing your own analyser for a language is quite a task. Yep. Haskell-language-server is very nice, though there are some performance issues I've experienced with a template Haskell heavy large codebase. For many cases though, the experiences is very smooth after install. Install issues are close to being sorted out with static binaries being downloaded in the vscode extension for instance.