* lisp/treesit.el (treesit-show-paren-data--categorize): Add docstring.

(bug#77906)

(cherry picked from commit 573a2c09b991df5442ab3b9984c2885011153333)

diff --git a/lisp/treesit.el b/lisp/treesit.el
index c85768256f7a5c771f81d5556893b8e0f5f0068b..06500c61a0327675929fe61e0934f6d49717f643 100644 (file)
--- a/lisp/treesit.el
+++ b/lisp/treesit.el
@@ -4200,6 +4200,9 @@ Expected to be called after each text change."
 ;;; Show paren mode
 
 (defun treesit-show-paren-data--categorize (pos &optional end-p)
+  "Return a list suitable for `show-paren-data-function' (which see).
+If the optional argument END-P is non-nil, interpret the position POS
+as belonging to the node that ends before POS (by subtracting 1 from POS)."
   (let* ((pred 'list)
          (parent (when (treesit-thing-defined-p
                         pred (treesit-language-at (if end-p (1- pos) pos)))