From: Stefan Monnier <monnier@iro.umontreal.ca>
To: michael_heerdegen@web.de
Cc: 13422@debbugs.gnu.org
Subject: bug#13422: 24.2.91; Feature request: Add a macro always expanding to nil
Date: Sat, 12 Jan 2013 19:34:54 -0500 [thread overview]
Message-ID: <jwvip72c4cl.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <87ip72jnbr.fsf@web.de> (Michael Heerdegen's message of "Sat, 12 Jan 2013 18:58:00 +0100")
> it has several advantages:
Of course, it also has its down sides:
- returns nil, so (if foo (discard bar) then) runs the `then' in the
`else' branch.
- only works at those syntactic places where an expression is expected
(e.g. (let ((a 1) (discard exp1 exp2) (b 2)) blabla) doesn't work.
In any case, I think the current comments are good enough, and save the
programmer from having to choose which kind of comment to use.
Stefan
next prev parent reply other threads:[~2013-01-13 0:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-12 17:58 bug#13422: 24.2.91; Feature request: Add a macro always expanding to nil Michael Heerdegen
2013-01-12 20:19 ` Andreas Schwab
2013-01-12 21:50 ` Michael Heerdegen
2013-01-12 23:15 ` Andreas Schwab
2013-01-12 23:41 ` Michael Heerdegen
2013-01-12 23:58 ` Andreas Schwab
2013-01-13 0:34 ` Stefan Monnier [this message]
2013-01-13 2:36 ` Michael Heerdegen
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