Re: Patch: Syntax and Hard Newlines

["Herbert Euler" <herberteuler@hotmail.com>]

>A silly question maybe: Wouldn't
>
>+     (kill-local-variable 'parse-sexp-lookup-properties)
>
>cause problems for major modes using that?
>
>I suppose it would be cleaner to require minor modes that want to turn
>on/off `parse-sexp-lookup-properties' in a buffer append/remove their
>name from/to that variable and kill it iff that list gets empty.

No, `kill-local-variable' only makes a variable no longer have a
separate value in the current buffer.  The same variable (perhaps
local) in other buffers is not affected, either does the global
version of the variable:

(setq abc 7)
==> 7
(setq b1 (get-buffer-create "b1"))
==> #<buffer b1>
(setq b2 (get-buffer-create "b2"))
==> #<buffer b2>
(save-window-excursion (switch-to-buffer b1)
                       abc)
==> 7
(save-window-excursion (switch-to-buffer b2)
                       abc)
==> 7
(save-window-excursion (switch-to-buffer b1)
                       (make-local-variable 'abc)
                       (setq abc 5)
                       abc)
==> 5
abc
==> 7
(save-window-excursion (switch-to-buffer b2)
                       (make-local-variable 'abc)
                       (setq abc 9)
                       abc)
==> 9
abc
==> 7
(save-window-excursion (switch-to-buffer b1)
                       (kill-local-variable 'abc)
                       abc)
==> 7
abc
==> 7
(save-window-excursion (switch-to-buffer b2)
                       abc)
==> 9
abc
==> 7

Regards,
Guanpeng Xu

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