From: Ihor Radchenko <yantar92@posteo.net>
To: emacs-devel@gnu.org
Subject: Should `indirect-function' be preferred over `fboundp'?
Date: Thu, 20 Jul 2023 07:08:48 +0000 [thread overview]
Message-ID: <87h6pzxdof.fsf@localhost> (raw)
Hi,
I have recently stumbled upon the common Elisp pattern
(when (fboundp func) (funcall func)) failing.
This is happening when a symbol is declared as function alias to
non-existing function:
(defalias 'yant/foo 'yant/bar)
(fboundp 'yant/foo) ; => t
(funcall 'yant/foo) ; => ERROR: Symbol function definition is void: yant/foo
In contrast, `indirect-function' does a better job determining whether a
given symbol can be called as a function:
(indirect-function 'yant/foo) ; => nil
Is it something widely known?
Is it something to worry about?
(I can see that `fboundp' is used all over Emacs git sources, while
`indirect-function' is rarely used)
--
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>
next reply other threads:[~2023-07-20 7:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-20 7:08 Ihor Radchenko [this message]
2023-07-20 7:42 ` Should `indirect-function' be preferred over `fboundp'? Eli Zaretskii
2023-07-20 8:23 ` Ihor Radchenko
2023-07-20 7:47 ` Andreas Schwab
2023-07-20 8:25 ` Ihor Radchenko
2023-07-20 13:02 ` Alan Mackenzie
2023-07-20 13:08 ` Ihor Radchenko
2023-07-21 1:08 ` Michael Heerdegen
2023-07-21 6:07 ` Ihor Radchenko
2023-07-22 2:49 ` Michael Heerdegen
2023-07-22 10:51 ` Ihor Radchenko
2023-07-23 2:37 ` Michael Heerdegen
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