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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