* defcustom :set vs. add-variable-watcher
@ 2023-01-05 8:06 Ihor Radchenko
0 siblings, 0 replies; only message in thread
From: Ihor Radchenko @ 2023-01-05 8:06 UTC (permalink / raw)
To: emacs-devel
Hi,
AFAIK, the traditional way to provide side effects to customization
value changes if :set option in `defcustom' definition.
However, it has been suggested [1] that one might also utilize
`add-variable-watcher' for the same purpose.
Given that many users don't actually use customize interface and instead
tend to set variables directly, `add-variable-watcher' looks like a more
reliable option compared to :set.
Are there any reasons to prefer :set over `add-variable-watcher'? Maybe
some non-obvious pitfalls?
[1] https://orgmode.org/list/87h6x8kluc.fsf@localhost
--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
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2023-01-05 8:06 defcustom :set vs. add-variable-watcher Ihor Radchenko
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