From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: 7146@debbugs.gnu.org, Frank <some.frank@gmail.com>,
Lars Magne Ingebrigtsen <larsi@gnus.org>,
Chong Yidong <cyd@stupidchicken.com>
Subject: bug#7146: (make-symbol "") issues
Date: Sat, 16 Jul 2011 23:16:02 -0400 [thread overview]
Message-ID: <jwvei1pzliv.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <m27h7kvniq.fsf@igel.home> (Andreas Schwab's message of "Thu, 14 Jul 2011 18:24:13 +0200")
>> Even though this is obscure, this is a bug that can crash (some builds
>> of) Emacs. So I rather think this should be fixed. Was any work done
>> towards adding a printed representation of empty-string symbols?
> What would be a good mnemonic? We need two different representations
> (interned and uninterned), perhaps ## and #= ?
"#:" is the obvious choice for the uninterned representation.
It already works for printing, but is not understood by the reader.
CommonLisp has a |....| syntax for interned symbols which trivially
allows empty symbols, and some Scheme iumplementations adopted it as
well, although R6RS didn't (it did add a \xNNNN notation which allows
for non-ASCII chars, but it doesn't seem to include a notation for empty
symbols).
Stefan
next prev parent reply other threads:[~2011-07-17 3:16 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-02 4:19 bug#7146: (make-symbol "") issues Frank
2010-10-03 0:44 ` Frank
2010-10-03 1:32 ` Chong Yidong
2010-10-03 3:44 ` Frank
2010-10-03 4:05 ` Chong Yidong
2010-10-03 4:14 ` Frank
2010-10-03 4:36 ` Juanma Barranquero
2010-10-03 10:28 ` Johan Bockgård
2010-10-03 14:55 ` Chong Yidong
2010-10-03 23:12 ` Stefan Monnier
2011-07-14 14:25 ` Lars Magne Ingebrigtsen
2011-07-14 16:24 ` Andreas Schwab
2011-07-17 3:16 ` Stefan Monnier [this message]
2011-07-17 8:15 ` Andreas Schwab
2011-07-18 15:30 ` Stefan Monnier
2011-07-21 19:25 ` Chong Yidong
2011-07-28 21:11 ` Andreas Schwab
2011-07-17 21:41 ` David De La Harpe Golden
2010-10-03 18:45 ` MON KEY
2010-10-03 18:56 ` Chong Yidong
2010-10-03 23:48 ` MON KEY
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