From: Drew Adams <drew.adams@oracle.com>
To: Michael Heerdegen <michael_heerdegen@web.de>, help-gnu-emacs@gnu.org
Subject: RE: To `boundp' or not to `boundp'?
Date: Tue, 1 Sep 2015 11:00:23 -0700 (PDT) [thread overview]
Message-ID: <03650f69-e11e-4fe9-9046-acabd0065ce6@default> (raw)
In-Reply-To: <87k2sat646.fsf@web.de>
> > If they really wanted a macro for this, it should have been called
> > something that reflects what it does, e.g., `var-value-or-nil' or
> > `if-bound-then-value-else-nil'.
>
> One needs this quite often, so it's good to factor it out.
And so it was. I'm not convinced it helps. But if it helps you, great.
(and (boundp 'VAR) VAR) works for me.
> I've no strong opinion about the name, but I guess the macro was indeed
> intended for cases where the return value is used as a boolean. There
> are other use cases where the name then is confusing. Maybe
> `symbol-value-safe' in analogy to `car-safe' would be better? Then it
> would have to be a function, though.
I don't see why it would have to be a function, just due to a name
change. But the name is what it is, and likely won't be changed.
(And whatever the name, I will likely use (and (boundp 'VAR) VAR).)
next prev parent reply other threads:[~2015-09-01 18:00 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-01 15:50 To `boundp' or not to `boundp'? Alexander Shukaev
2015-09-01 15:51 ` Dmitry Gutov
2015-09-01 15:53 ` Alexander Shukaev
2015-09-01 16:42 ` Drew Adams
2015-09-01 17:13 ` Michael Heerdegen
2015-09-01 18:00 ` Drew Adams [this message]
[not found] ` <mailman.331.1441125765.19560.help-gnu-emacs@gnu.org>
2015-09-01 20:20 ` Barry Margolin
2015-09-01 23:37 ` member returns list (was: Re: To `boundp' or not to `boundp'?) Emanuel Berg
2015-09-02 0:10 ` Drew Adams
2015-09-02 0:27 ` Emanuel Berg
2015-09-02 0:38 ` Drew Adams
2015-09-02 1:17 ` Emanuel Berg
2015-09-02 6:21 ` Drew Adams
2015-09-02 21:20 ` Emanuel Berg
[not found] ` <mailman.370.1441156160.19560.help-gnu-emacs@gnu.org>
2015-09-03 5:17 ` member returns list Pascal J. Bourguignon
2015-09-04 0:26 ` Emanuel Berg
2015-09-02 16:45 ` Michael Heerdegen
2015-09-02 21:47 ` Emanuel Berg
2015-09-02 22:09 ` Michael Heerdegen
2015-09-02 22:11 ` Drew Adams
2015-09-02 22:13 ` Marcin Borkowski
2015-09-04 1:03 ` Emanuel Berg
2015-09-04 6:50 ` Marcin Borkowski
2015-09-05 17:35 ` Emanuel Berg
2015-09-05 17:55 ` Random832
2015-09-05 18:09 ` Emanuel Berg
2015-09-05 21:04 ` Random832
2015-09-06 2:57 ` Emanuel Berg
[not found] ` <mailman.552.1441475739.19560.help-gnu-emacs@gnu.org>
2015-09-05 23:39 ` Pascal J. Bourguignon
2015-09-06 2:46 ` Emanuel Berg
2015-09-09 1:48 ` Robert Thorpe
2015-09-09 2:44 ` Pascal J. Bourguignon
2015-09-09 3:19 ` John Mastro
2015-09-10 0:25 ` Emanuel Berg
[not found] ` <mailman.557.1441507097.19560.help-gnu-emacs@gnu.org>
2015-09-06 21:20 ` Pascal J. Bourguignon
2015-09-06 23:33 ` Emanuel Berg
[not found] ` <mailman.598.1441581917.19560.help-gnu-emacs@gnu.org>
2015-09-06 23:47 ` Pascal J. Bourguignon
2015-09-07 1:29 ` Pascal J. Bourguignon
2015-09-07 2:25 ` Emanuel Berg
2015-09-09 1:44 ` Robert Thorpe
2015-09-10 0:23 ` Emanuel Berg
[not found] ` <mailman.793.1441844665.19560.help-gnu-emacs@gnu.org>
2015-09-10 2:01 ` Pascal J. Bourguignon
2015-09-10 2:32 ` Emanuel Berg
[not found] ` <ECCA0E56-A051-4D38-8CBB-6CE9208BB047@openmailbox.org>
2015-09-11 1:32 ` Emanuel Berg
2015-09-11 1:46 ` Emanuel Berg
[not found] ` <mailman.797.1441852386.19560.help-gnu-emacs@gnu.org>
2015-09-10 4:21 ` Pascal J. Bourguignon
2015-09-10 18:09 ` Alex Kost
2015-09-11 1:01 ` Random832
2015-09-11 1:28 ` Emanuel Berg
2015-09-11 2:01 ` Emanuel Berg
2015-09-11 2:52 ` Random832
[not found] ` <mailman.890.1441936900.19560.help-gnu-emacs@gnu.org>
2015-09-11 2:27 ` Pascal J. Bourguignon
2015-09-12 0:10 ` Emanuel Berg
2015-09-11 2:37 ` Ian Zimmerman
2015-09-11 1:03 ` Emanuel Berg
2015-09-11 0:57 ` Emanuel Berg
2015-09-11 5:42 ` tomas
2015-09-12 0:18 ` Emanuel Berg
2015-09-13 8:12 ` tomas
[not found] ` <mailman.897.1441950163.19560.help-gnu-emacs@gnu.org>
2015-09-11 23:29 ` Pascal J. Bourguignon
2015-09-12 0:20 ` Emanuel Berg
[not found] ` <mailman.966.1442016910.19560.help-gnu-emacs@gnu.org>
2015-09-12 2:01 ` Pascal J. Bourguignon
2015-09-12 3:26 ` Emanuel Berg
2015-09-13 7:50 ` tomas
2015-09-12 2:03 ` Pascal J. Bourguignon
2015-09-12 2:45 ` Stefan Monnier
2015-09-12 3:12 ` Emanuel Berg
2015-09-12 3:31 ` Emanuel Berg
[not found] ` <mailman.972.1442025961.19560.help-gnu-emacs@gnu.org>
2015-09-12 6:16 ` Pascal J. Bourguignon
2015-09-12 23:38 ` Emanuel Berg
2015-09-13 8:03 ` tomas
2015-09-14 1:31 ` Emanuel Berg
[not found] ` <mailman.1016.1442100597.19560.help-gnu-emacs@gnu.org>
2015-09-13 0:09 ` Pascal J. Bourguignon
2015-09-13 0:24 ` John Mastro
[not found] ` <mailman.1019.1442103883.19560.help-gnu-emacs@gnu.org>
2015-09-13 4:29 ` Pascal J. Bourguignon
2015-09-16 0:01 ` computer history (was: Re: member returns list) Emanuel Berg
[not found] ` <mailman.978.1442028310.19560.help-gnu-emacs@gnu.org>
2015-09-12 6:18 ` member returns list Pascal J. Bourguignon
2015-09-12 23:56 ` Emanuel Berg
[not found] ` <mailman.1018.1442101697.19560.help-gnu-emacs@gnu.org>
2015-09-13 0:20 ` Pascal J. Bourguignon
2015-09-14 1:24 ` Emanuel Berg
2015-09-12 2:04 ` Pascal J. Bourguignon
2015-09-12 3:15 ` Emanuel Berg
2015-09-12 7:40 ` Eli Zaretskii
[not found] ` <mailman.884.1441933051.19560.help-gnu-emacs@gnu.org>
2015-09-11 2:26 ` Pascal J. Bourguignon
2015-09-12 0:16 ` Emanuel Berg
2015-09-07 2:38 ` Drew Adams
2015-09-07 2:37 ` Drew Adams
[not found] ` <mailman.502.1441349470.19560.help-gnu-emacs@gnu.org>
2015-09-04 17:26 ` Barry Margolin
2015-09-05 17:40 ` Emanuel Berg
2015-09-02 0:40 ` member (was: Re: To `boundp' or not to `boundp'?) Emanuel Berg
[not found] ` <mailman.363.1441150201.19560.help-gnu-emacs@gnu.org>
2015-09-02 16:25 ` member returns list " Barry Margolin
2015-09-02 21:35 ` Emanuel Berg
[not found] ` <mailman.426.1441229773.19560.help-gnu-emacs@gnu.org>
2015-09-02 22:56 ` Barry Margolin
2015-09-02 23:23 ` Emanuel Berg
[not found] ` <mailman.368.1441153951.19560.help-gnu-emacs@gnu.org>
2015-09-03 5:19 ` member Pascal J. Bourguignon
2015-09-04 0:24 ` member Emanuel Berg
[not found] ` <<barmar-B5D67F.16201001092015@88-209-239-213.giganet.hu>
2015-09-01 20:42 ` To `boundp' or not to `boundp'? Drew Adams
2015-09-02 2:12 ` Stefan Monnier
2015-09-02 15:26 ` Alexander Shukaev
2015-09-02 16:51 ` Michael Heerdegen
[not found] ` <mailman.410.1441212753.19560.help-gnu-emacs@gnu.org>
2015-09-02 20:00 ` Barry Margolin
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