Haskell syntax highlighting?

[414owen]

Adding this to languages.toml gets LSP working:

[[language]]
name = "haskell"
scope = "source.haskell"
injection-regex = "haskell"
file-types = ["hs"]
roots = []
auto-format = false
comment-token = "--"
language-server = { command = "haskell-language-server-wrapper", args = ["--lsp"] }
indent = { tab-width = 2, unit = "  " }

But there's no syntax highlighting. I'm not sure why, tree-sitter-haskell is a submodule of the repo, and there seem to be queries under runtime/queries.

I'm on helix 0.5.0 from nixpkgs,but I've also tried master, although when I build master I don't even get rust syntax highlighting.

Any pointers?

[Triton171]

There is currently an issue preventing tree-sitter-haskell from compiling on some systems. The reason is that it uses C++ 14 features but some OSs still use C++ 11 by default. Because of this, the haskell treesitter grammar was disabled in helix.
As far as I can see, this can usually be fixed by using a different C++ compiler or explicitly specifying the version. Also, I believe there was some talk on Matrix about re-enabling it even if it breaks compilation with older C++ compilers. Maybe @archseer knows when we should expect this to be re-enabled?

[414owen]

Hmm, the nix expression uses its own toolchain, so it might not have this problem.