Consider using Tree-Sitter

I see you are using Chicken Scheme for C processing. I recommend taking a look at Tree-Sitter, it has many grammars, including C one: - https://tree-sitter.github.io - https://github.com/tree-sitter/tree-sitter - https://github.com/tree-sitter/tree-sitter-c Here you can see how different queries work with TS, including highlighting: https://github.com/nvim-treesitter/nvim-treesitter/tree/master/queries/c