GNU bug report logs - #32252
[PATCH] %o and %x now format signed numbers

Previous Next

Package: emacs;

Reported by: Paul Eggert <eggert <at> cs.ucla.edu>

Date: Mon, 23 Jul 2018 19:14:02 UTC

Severity: normal

Tags: patch

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

Full log

View this message in rfc822 format

From: Helmut Eller <eller.helmut <at> gmail.com>
To: 32252 <at> debbugs.gnu.org
Subject: bug#32252: [PATCH] %o and %x now format signed numbers
Date: Thu, 26 Jul 2018 19:18:48 +0200

On Thu, Jul 26 2018, Andy Moreton wrote:

>> That is how other Lisps do it, it works well for them, and Emacs Lisp should
>> do likewise.
>
> That is uncontroversial for arithmetic operations, but how are bitwise
> logical operations handled in other lisps with bignums ?

In Common Lisp those are defined to behave as if integers were
represented in two's complement form, regardless of how integers are
represented internally.

Interestinlgy, Common Lisp has ASH but no direct equivalent to Emacs
Lisp's lsh.  Let's see how the bignum proponents extend lsh.

Helmut
This bug report was last modified 2 years and 322 days ago.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.