Strange inconsistency with face preservation in yanking

Strange inconsistency with face preservation in yanking

[Yuchen Pei]

Hi,

If I do

#+begin_src emacs-lisp
(setq bar "
(defun my-hello ()
  (message \"hello\")
")
(defun my-insert-copy ()
  (insert bar)
  (copy-region-as-kill (point-min) (point-max)))
#+end_src

Open a new elisp file, e.g. foo.el in a buffer, and another file with no
extension, e.g. foo in another buffer. Have them both side by side in
two windows.

In the buffer foo.el, if we eval the function call (my-insert-copy),
then switch to the buffer foo, and call (yank) or just do C-y. The text
is pasted without elisp syntax highlight.

However, if we eval the two expressions inside the body of
my-insert-copy one by one, i.e.

(insert bar)
(copy-region-as-kill (point-min) (point-max))

Then switch to the buffer foo, and do C-y

The highlight is preserved.

Why?

Best,
Yuchen

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Dr Yuchen Pei | https://ypei.org | Timezone: UTC+11
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