Re: trouble with the colored string in R chunk

I work with emacs28.1.

I discovered that my trouble came from the fact that I activate 
tree-sitter in my init.el (I found that the coloration was better with 
tree-sitter). When I disable tree-sitter I do have the strings 
coloration in the chunks R with polymode. When I am in a .R file, in 
order to activate tree-sitter, I use the following function:

;; activate/desactivate tree-sitter on demand
(defun my-toggle-tree-sitter ()
   (interactive)
   (if (bound-and-true-p tree-sitter-mode)
       (progn
         (tree-sitter-mode -1)
         (tree-sitter-hl-mode -1)
         (message "Tree-sitter désactivé"))
     (progn
       (tree-sitter-mode 1)
       (tree-sitter-hl-mode 1)
       (message "Tree-sitter activé"))))


(define-key ess-r-mode-map (kbd "C-c t") #'my-toggle-tree-sitter)

I tried to use the following code in my init.el to disable tree-sitter 
in the chunks R with polymode but it doesn't work:

;; desactivate tree-sitter-mode in the chunks R in polymode
(defun my-polymode-r-disable-treesitter ()
   (when (bound-and-true-p tree-sitter-mode)
     (tree-sitter-mode -1))
   (when (bound-and-true-p tree-sitter-hl-mode)
     (tree-sitter-hl-mode -1)))

(add-hook 'poly-noweb+r-mode-hook #'my-polymode-r-disable-treesitter)



Le 11/02/2026 à 10:52, Martin Maechler a écrit :
>>>>>> Dirk Eddelbuettel via ESS-help
>>>>>>      on Sat, 7 Feb 2026 10:46:24 -0600 writes:
>      > On 7 February 2026 at 17:13, LaurentEss via ESS-help wrote:
>      > | Ok, thank you for this information.
>      > |
>      > | I must have a problem with my configuration but I feel that I will have
>      > | trouble finding where my problem comes from.
>
>      > Three+ decades emacs user here who also still struggles comprehending a
>      > 'built over 30+ years' "superfund site" of his own ~/.emacs ... but I added
>      > these lines a while back, and it seems to do the trick (thanks to the code in
>      > ess and poly* modes):
>
>      > ;;; MARKDOWN
>      > (add-to-list 'auto-mode-alist '("\\.md" . poly-markdown-mode))
>      > ;;; R modes
>      > (add-to-list 'auto-mode-alist '("\\.Snw" . poly-noweb+r-mode))
>      > (add-to-list 'auto-mode-alist '("\\.Rnw" . poly-noweb+r-mode))
>      > (add-to-list 'auto-mode-alist '("\\.Rmd" . poly-markdown+r-mode))
>
> Thank you, Dirk.
>
> I wonder why / if the above is still needed, as you do mention
> the polymode packages poly-*  and of course have and use
> poly-R , no?  It already has such definitions, see
>
>    https://github.com/polymode/poly-R/blob/master/poly-R.el#L736
>
> and so I do wonder ...
>
> Martin
>
>      > I edit mixed use files all the time as Rmd with code snippets, even if I
>      > often just rely on the mixed-mode highlighting.  But works in output and
>      > during editing. Otherwise mostly defaults for both ess and poly-* (modulo
>      > some small overrides I had for years).
>
>      > Dirk
>
>      > --
>      > dirk.eddelbuettel.com | @eddelbuettel | [email protected]

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