csharp-mode VS tree-sitter-c

csharp-mode is an installed package. Status: Installed in ‘csharp-mode-20210105.1950/’ (unsigned). Delete Version: 20210105.1950 Summary: C# mode derived mode Homepage: https://github.com/emacs-csharp/csharp-mode Keywords: c# languages oop mode Other versions: 0.11.0 (installed), 20211124.1105 (Melpa), 20200402.919 (melpa), 1.1.1 (Melpa Stable), 0.9.0 (marmalade).

Tooting my own horn, Emacs’ csharp-mode[1] is undergoing a rewrite to be 100% based on tree-sitter rather than regexps.

The new code runs way faster and is so much nicer to work with.

Once all the kinks are gone, I can’t imagine going back.

[1] https://github.com/emacs-csharp/csharp-mode/blob/master/csha...

(use-package treesit :ensure nil :custom ;; Some stuff taken from here: https://robbmann.io/posts/emacs-treesit-auto/ (treesit-extra-load-path '("/usr/lib64/")) (treesit-language-source-alist '((bash . ("https://github.com/tree-sitter/tree-sitter-bash")) (c . ("https://github.com/tree-sitter/tree-sitter-c")) (c++ . ("https://github.com/tree-sitter/tree-sitter-cpp")) (csharp . ("https://github.com/tree-sitter/tree-sitter-c-sharp")) (css . ("https://github.com/tree-sitter/tree-sitter-css")) (elixir ("https://github.com/elixir-lang/tree-sitter-elixir")) (html . ("https://github.com/tree-sitter/tree-sitter-html")) (java . ("https://github.com/tree-sitter/tree-sitter-java")) (javascript . ("https://github.com/tree-sitter/tree-sitter-javascript")) (json . ("https://github.com/tree-sitter/tree-sitter-json")) (lua . ("https://github.com/Azganoth/tree-sitter-lua")) (makefile . ("https://github.com/alemuller/tree-sitter-make")) (org . ("https://github.com/milisims/tree-sitter-org")) (python . ("https://github.com/tree-sitter/tree-sitter-python")) (tsx . ("https://github.com/tree-sitter/tree-sitter-typescript" "master" "tsx/src")) (typescript . ("https://github.com/tree-sitter/tree-sitter-typescript" "master" "typescript/src")) (ruby . ("https://github.com/tree-sitter/tree-sitter-ruby")) (rust . ("https://github.com/tree-sitter/tree-sitter-rust")) (sql . ("https://github.com/m-novikov/tree-sitter-sql")) (toml . ("https://github.com/tree-sitter/tree-sitter-toml")) (yaml . ("https://github.com/ikatyang/tree-sitter-yaml")))) (major-mode-remap-alist '((c-mode . c-ts-mode) (c++-mode . c++-ts-mode) (csharp-mode . csharp-ts-mode) (css-mode . css-ts-mode) (html-mode . html-ts-mode) (java-mode . java-ts-mode) (js-mode . js-ts-mode) (json-mode . json-ts-mode) (makefile-mode . makefile-ts-mode) ;; (org-mode . org-ts-mode) ;; not mature yet (python-mode . python-ts-mode) (typescript-mode . typescript-ts-mode) (ruby-mode . ruby-ts-mode) (rust-mode . rust-ts-mode) (toml-mode . toml-ts-mode) (yaml-mode . yaml-ts-mode))) (treesit-auto-fallback-alist '((toml-ts-mode . conf-toml-mode) (typescript-ts-mode . nil) (tsx-ts-mode . nil))) (treesit-font-lock-settings t) (treesit-simple-indent t) (treesit-defun-type-regexp t)) (use-package treesit-auto :demand t :config (setq treesit-auto-install t) (global-treesit-auto-mode))

The feature isn't working well yet on C and C++. If I recall correctly it's based on Tree-Sitter[1] parsing, and there are still too many bugs in corresponding grammars - tree-sitter-c[2] and tree-sitter-cpp[3]. Hopefully, it will be greatly improved in the future as the share of the existing and newly written code in C and C++ is quite significant.

[1] https://tree-sitter.github.io/tree-sitter/

[2] https://github.com/tree-sitter/tree-sitter-c/issues

[3] https://github.com/tree-sitter/tree-sitter-cpp/issues

[[language]] name = "c" scope = "source.c" injection-regex = "c" file-types = ["c"] # TODO: ["h"] roots = [] comment-token = "//" language-server = { command = "clangd" } indent = { tab-width = 8, unit = " " } [language.debugger] name = "lldb-vscode" transport = "stdio" command = "lldb-vscode" [[language.debugger.templates]] name = "binary" request = "launch" completion = [ { name = "binary", completion = "filename" } ] args = { console = "internalConsole", program = "{0}" } [[language.debugger.templates]] name = "attach" request = "attach" completion = [ "pid" ] args = { console = "internalConsole", pid = "{0}" } [[language.debugger.templates]] name = "gdbserver attach" request = "attach" completion = [ { name = "lldb connect url", default = "connect://localhost:3333" }, { name = "file", completion = "filename" }, "pid" ] args = { console = "internalConsole", attachCommands = [ "platform select remote-gdb-server", "platform connect {0}", "file {1}", "attach {2}" ] } [[grammar]] name = "c" source = { git = "https://github.com/tree-sitter/tree-sitter-c", rev = "7175a6dd5fc1cee660dce6fe23f6043d75af424a" }

There's no way to highlight format specs currently, since the treesitter C grammar doesn't specify them. You could open an issue on the tree-sitter-c repo.

[1] https://github.com/tree-sitter/tree-sitter-c/issues/51