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bug#21440: 25.0.50; Manual: FEATURE-unload-hook in (info "(elisp) Coding
From: |
Michael Heerdegen |
Subject: |
bug#21440: 25.0.50; Manual: FEATURE-unload-hook in (info "(elisp) Coding Conventions") |
Date: |
Wed, 09 Sep 2015 13:43:36 +0200 |
Hi,
In (info "(elisp) Coding Conventions"):
• If loading the file adds functions to hooks, define a function
‘FEATURE-unload-hook’, where FEATURE is the name of the feature the
package provides, and make it undo any such changes. Using
‘unload-feature’ to unload the file will run this function. *Note
Unloading.
A problematic tip:
- it is unnecessary for that reason. AFAIK FEATURE's functions are
removed automatically from hooks by `unload-feature'.
- When you follow the advice, `unload-feature' will skip removing
entries from `auto-mode-alist', so you would have to do that yourself.
- Isn't `FEATURE-unload-function' the preferred thing to use today?
The doc string of `unload-feature' doesn't even mention
FEATURE-unload-hook variables. Seems it is discouraged to be used.
BTW, I miss a comment what I should do if a feature added functions to
the buffer local binding of a hook. Does `unload-feature' take care of
that (doesn't seem so)? Nothing about this in (info "(elisp) Unloading").
Thanks,
Michael.
In GNU Emacs 25.0.50.19 (x86_64-unknown-linux-gnu, GTK+ Version 3.16.6)
of 2015-09-07
Repository revision: af629df80605614c645ba6539bb98d4f1e990925
Windowing system distributor 'The X.Org Foundation', version 11.0.11702000
System Description: Debian GNU/Linux testing (stretch)
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