From: Bill Wohler <wohler@newt.com>
Subject: Re: defvars at compile time
Date: Thu, 16 Mar 2006 14:51:12 -0800 [thread overview]
Message-ID: <87zmjqovfj.fsf@olgas.newt.com> (raw)
In-Reply-To: yoij3bhija9c.fsf@linus003.dd.chalmers.se
bojohan+news@dd.chalmers.se (Johan Bockgård) writes:
> Kevin Rodgers <ihs_4664@yahoo.com> writes:
>
>> (defmacro symbol-value-safe (symbol)
>> "Return SYMBOL's value, but avoid signaling an error if it is void.
>> If SYMBOL is void, return nil."
> [...]
>
> ,----[ C-h f bound-and-true-p RET ]
> | bound-and-true-p is a Lisp macro in `bindings.el'.
> | (bound-and-true-p VAR)
> |
> | Return the value of symbol VAR if it is bound, else nil.
> `----
Nice. Too bad it's not available in XEmacs (21).
Funny name. Seems like value-if-bound would be more accurate.
--
Bill Wohler <wohler@newt.com> http://www.newt.com/wohler/ GnuPG ID:610BD9AD
Maintainer of comp.mail.mh FAQ and MH-E. Vote Libertarian!
If you're passed on the right, you're in the wrong lane.
next prev parent reply other threads:[~2006-03-16 22:51 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-07 0:18 New GNOME icons Bill Wohler
2006-03-10 23:15 ` Bill Wohler
2006-03-10 23:56 ` Reiner Steib
2006-03-11 1:23 ` Bill Wohler
2006-03-11 1:29 ` Miles Bader
2006-03-11 12:48 ` Reiner Steib
2006-03-11 23:47 ` Miles Bader
2006-03-12 0:38 ` Bill Wohler
2006-03-13 11:52 ` Katsumi Yamaoka
[not found] ` <3861.1142268982@olgas.newt.com>
[not found] ` <b4mr755zj4i.fsf@jpl.org>
[not found] ` <22907.1142318606@olgas.newt.com>
[not found] ` <stewtext5sn.fsf@marauder.physik.uni-ulm.de>
[not found] ` <3669.1142364565@olgas.newt.com>
[not found] ` <v9y7zcrbc1.fsf@marauder.physik.uni-ulm.de>
[not found] ` <7035.1142372131@olgas.newt.com>
[not found] ` <v93bhjrjrd.fsf@marauder.physik.uni-ulm.de>
[not found] ` <28215.1142437339@olgas.newt.com>
[not found] ` <v9irqf1x1t.fsf_-_@marauder.physik.uni-ulm.de>
2006-03-15 22:52 ` defvars at compile time Katsumi Yamaoka
2006-03-16 18:31 ` Kevin Rodgers
2006-03-16 22:27 ` Johan Bockgård
2006-03-16 22:51 ` Bill Wohler [this message]
2006-03-17 2:44 ` Miles Bader
2006-03-17 16:32 ` Richard Stallman
2006-03-20 6:31 ` Stefan Monnier
2006-03-22 1:59 ` Katsumi Yamaoka
2006-03-22 2:20 ` Stefan Monnier
2006-03-28 1:41 ` Bill Wohler
2006-03-28 19:20 ` Stefan Monnier
2006-03-29 23:01 ` Richard Stallman
2006-03-28 19:33 ` Richard Stallman
-- strict thread matches above, loose matches on Subject: below --
2005-09-16 10:48 Juanma Barranquero
2005-09-16 11:18 ` David Kastrup
2005-09-16 13:25 ` Juanma Barranquero
2005-09-16 14:59 ` David Kastrup
2005-09-16 15:48 ` Stefan Monnier
2005-09-16 15:51 ` Juanma Barranquero
2005-09-17 4:57 ` Richard M. Stallman
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