No syntax highlight for C++ with tree-sitter

[emacsbliss]

When I use C++-ts-mode and installed language grammar, open C++ file there is no syntax highlighting for most parts, only for #include.

Does that mean I need to install some extra package to get that? Looks like c++-mode has syntax highlight but that's not tree-sitter based.

[abougouffa]

Which version of Emacs you are using? Try to evaluate system-configuration-features to see if Emacs has been built with tree-sitter support.

[emacsbliss]

emacs version: GNU Emacs 29.0.92 (build 2, aarch64-apple-darwin22.5.0, NS appkit-2299.60 Version 13.4.1 (Build 22F82)) of 2023-07-19

system-configuration-features has value:

"ACL GLIB GNUTLS IMAGEMAGICK JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY KQUEUE NS PDUMPER PNG RSVG SQLITE3 THREADS TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM XWIDGETS ZLIB"

[abougouffa]

Can you try M-x minemacs-run-build-functions or M-x treesit-auto-install-all ?

[donneyluck]

i have same question ~
has TREE_SITTER too

[abougouffa]

I've faced the same issue (Emacs not loading the treesitter*.so files correctly. I've fixed it by recompiling Emacs (or maybe, reinstalling Emacs if you have installed it from your distro's package manager).

Then, by running:

cd ~/.emacs.d  # Where MinEmacs is cloned
make clean_all
emacs

[donneyluck]

What is your emacs version? I used the latest version of emacs on manjaro and reinstalled and compiled it. It still cannot be displayed normally.

[abougouffa]

I'm using a locally compiled version of emacs-29 branch. Emacs v30 feels a bit unstable for me, it should work with the config, but I didn't test it exhaustively.

[donneyluck]

Ok I will test the local compiled version later. Can you tell me your compilation options and parameters?

[donneyluck]

I recompiled locally and installed 29.3 and the problem was solved thks

[donneyluck]

After I reinstalled the new version of minemacs, I can no longer use c++-ts-mode normally. I have a headache.

[donneyluck]

Weird, C/C++ are the modes that I use the most, and I didn't notice anything wrong with it lately.

Can you try with the last commit? I suspect an external package is causing this.

I recompiled emacs 29.3 and completely reinstalled minemacs, but c++-ts-mode still doesn't display normally. It's a real headache.

emacs 29.3 ./configure --with-native-compilation=aot --with-tree-sitter
manjaro i3wm lastest
minemacs lastest

[abougouffa]

Do you have the tree-sitter grammars installed? try treesit-auto-install-all to be sure.

I don't see why you have this behavior since I'm using MinEmacs mainly for C/C++ development and didn't notice something like this.

You can also try the next branch of MinEmacs!

[donneyluck]

Do you have the tree-sitter grammars installed? try treesit-auto-install-all to be sure.

I don't see why you have this behavior since I'm using MinEmacs mainly for C/C++ development and didn't notice something like this.

You can also try the next branch of MinEmacs!

libtree-sitter-cpp.so exists

I re-clone the next branch and it still cannot display colors correctly. I will test other versions of emacs later.

[abougouffa]

@donneyluck I've got the same behavior on my second machine. I can see that only some keywords are higlighted (only true, false and nullptr so far).

I don't know the cause of this issue, I will try to reproduce it in a minimal example to see if it comes from MinEmacs customization or from Emacs or Tree-sitter.

[abougouffa]

I've tested on a vanilla Emacs with emacs -Q. The issue is present also, so it is not a problem from MinEmacs!

Evaluate:

(setq treesit-language-source-alist '((cpp "https://github.com/tree-sitter/tree-sitter-cpp" nil nil nil nil)))
(treesit-install-language-grammar 'cpp)

Then C-x C-f and open a C++ file.

[abougouffa]

@emacsbliss @donneyluck

I managed to find the cause of the issue. It seems that the Tree-Sitter C++ grammar causes the issue after v0.22.0. I've pushed a fix b10bca5 to force treesit-auto to use the v0.22.0 of the grammar, and this fixes the problem for me.

You need to update MinEmacs to the last commit and remove the ~/.emacs.d/local/tree-sitter/libtree-sitter-cpp.so file, restart Emacs, then run treesit-auto-install-all.

Can you please confirm that the issue is fixed for you?

Edit

I've opened a PR in treesit-auto to fix the grammar revision to v0.22.0 until the issue get fixed renzmann/treesit-auto#106.

[donneyluck]

Thanks again for your help
you are really awesome