incorrect highlighting for multiply-nested TH splices / quasi-quotes

[Tobias Dammers]

Highlighting chokes on code that has multiple nested levels of splices and quasiquotes, like in this example:

mkServer :: String -> String -> [Name] -> ExpQ
mkServer pre post rqNames =
    [e|makeServer
        $(listE
            [ [| impl (undefined :: $(conT rqName)) |]
            | rqName <- rqNames
            ]) |]

Highlighting picks up the beginning of the [e| quote correctly, but then fails to recognize the inner quote ([| impl ...), interpreting its closing bracket as the closing bracket for the outer quote.

[Stephen Diehl]

Do you know of highlighting script that fixes this?

The current one is an adaption of this base: https://github.com/vim-scripts/haskell.vim/blob/master/syntax/haskell.vim

[Tobias Dammers]

Unfortunately, no, I've never dived into the wonderful world of vim syntax highlighting definitions, was hoping someone else might feel like looking into it.