`"colorizedBracketPairs"` only supports lowercase, but matching is case insensitive

[RedCMD]

in language-configuration.json; "brackets", "autoClosingPairs" and "surroundingPairs" are all case sensitive
but "colorizedBracketPairs" will only accept lowercase letters
yet the bracket pairing algorithm is case insensitive

[askvortsov1]

Is there a reason the bracket pairing algorithm needs to be case insensitive? I would expect all of these (bracket colorization, auto-closing, surrounding) to match on the exact strings provided.

In OCaml, the syntax for modules is:

module X = struct
  ...
end

But end is only a reserved keyword when lowercase; for instance, this is valid

type t = Start | End

If you have the following brackets config:

"brackets": [
        [
            "struct",
            "end"
        ]
    ]

and write the following code:

module X = struct
  type t = Start | End
end

VSCode will match the struct with End, not end, messing up bracket pair coloring (and probably other functionality) for the rest of the file.

Note that the markdown renderer here on GitHub handles this case correctly.

[dyedgreen]

We internally have a patch for this to make bracket pairs case sensitive (which is much nicer for OCaml, although I think other languages might have case insensitive bracket pairs?)

We would be interested in upstreaming these changes if there is interest for this.

[RedCMD]

But end is only a reserved keyword when lowercase

End can easily be disabled by the "unbalancedBracketScopes" key under "grammars" in the package.json file