Re: [Emacs-diffs] emacs-26 f5d0360: Escape column-zero doc parens

[Stefan Monnier]

>     Escape column-zero doc parens.  A shame bug#21871 remains unfixed.

Arguably the "open-paren in column 0" convention is not needed any more
(tho even with the patch below, "open-paren in column 0" is still used
in some places such as for the outline-regexp in elisp-mode).
Any objection to the patch below?


        Stefan


diff --git a/lisp/emacs-lisp/lisp.el b/lisp/emacs-lisp/lisp.el
index 6952ef4cf4..3211b54e2c 100644
--- a/lisp/emacs-lisp/lisp.el
+++ b/lisp/emacs-lisp/lisp.el
@@ -339,12 +339,17 @@ beginning-of-defun-raw
 
    ((or defun-prompt-regexp open-paren-in-column-0-is-defun-start)
     (and (< arg 0) (not (eobp)) (forward-char 1))
-    (and (re-search-backward (if defun-prompt-regexp
-                                (concat (if 
open-paren-in-column-0-is-defun-start
-                                            "^\\s(\\|" "")
-                                        "\\(?:" defun-prompt-regexp "\\)\\s(")
-                              "^\\s(")
-                            nil 'move arg)
+    (and (let (found)
+           (while
+               (and (set found
+                         (re-search-backward (if defun-prompt-regexp
+                                                (concat (if 
open-paren-in-column-0-is-defun-start
+                                                            "^\\s(\\|" "")
+                                                        "\\(?:" 
defun-prompt-regexp "\\)\\s(")
+                                              "^\\s(")
+                                            nil 'move arg))
+                    (nth 8 (syntax-ppss))))
+           found)
         (progn (goto-char (1- (match-end 0)))
                 t)))