Begin forwarded message:
Subject: Re: bug#40338: 27.0.60; c-fill-paragraph and after-change-functions
Date: March 31, 2020 at 11:27:23 AM GMT-4
On Mar 30, 2020, at 9:56 PM, Noam Postavsky <npostavs@gmail.com> wrote:
Yuan Fu <casouri@gmail.com> writes:
(defun mytrack-hook (beg end len)
(if (> len 0)
;; delete
(with-current-buffer trackbuf
(delete-region beg (+ beg len)))
;; insert
(let ((content (buffer-substring beg end)))
(with-current-buffer trackbuf
(goto-char beg)
(insert content)))))
I'm not very familiar with either eglot or cc-mode, but I can say the
problem in your example lies with mytrack-hook: there can be kinds of
changes other than just pure delete or insert (replace, for example).
It can be fixed like this:
(defun mytrack-hook (beg end len)
(when (> len 0)
;; Delete old text.
(with-current-buffer "trackbuf"
(delete-region beg (+ beg len))))
;; Insert new text.
(let ((content (buffer-substring beg end)))
(with-current-buffer "trackbuf"
(goto-char beg)
(insert content))))
Thank you. Indeed this works. Maybe the problem is not in c-fill-paragraph. Yuan
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