From: Mike Gran <spk121@yahoo.com>
To: Guile Devel <guile-devel@gnu.org>
Subject: Syntax for symbols is more permissive than R6RS
Date: Fri, 24 Apr 2009 00:27:44 -0700 [thread overview]
Message-ID: <1240558064.3133.147.camel@localhost.localdomain> (raw)
Hi,
I was poking around the reader while working on the Unicode stuff, and I
found that there aren't checks for a lot of symbol names that R6RS
considers to be invalid.
The following line has 11 dodgy but not invalid variable names:
+ - ... 00A @ [ \ ] { | }
They can be strung together to make fun code like this:
(define - 1)
(define [ 2)
(define ] 3)
(+ 1 [ - 2 3 ])
==> 12
Which of these are useful extensions and which of these are bugs?
Thanks,
Mike Gran
next reply other threads:[~2009-04-24 7:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-24 7:27 Mike Gran [this message]
2009-04-24 15:27 ` Syntax for symbols is more permissive than R6RS Ludovic Courtès
2009-04-27 20:26 ` Neil Jerram
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1240558064.3133.147.camel@localhost.localdomain \
--to=spk121@yahoo.com \
--cc=guile-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).