From: Marius Vollmer <mvo@zagadka.ping.de>
Cc: guile-devel@gnu.org
Subject: Re: real numbers and integer-expt.
Date: 13 Mar 2002 20:23:56 +0100 [thread overview]
Message-ID: <873cz4nuer.fsf@zagadka.ping.de> (raw)
In-Reply-To: <876640j23t.fsf@raven.i.defaultvalue.org>
Rob Browning <rlb@defaultvalue.org> writes:
> integer-expt says:
>
> SCM_DEFINE (scm_integer_expt, "integer-expt", 2, 0, 0,
> (SCM n, SCM k),
> "Return @var{n} raised to the non-negative integer exponent\n"
> "@var{k}.\n"
> "\n"
>
> but in the code we check to see if k satisfies SCM_REALP and if it
> does, we coerce it to an int and see if we get any lossage. If we
> don't then we decide it's OK to use it. Is that what we want,
Yes. Floats can be integers, too. However, there's a bug
nevertheless: floats can represent integers that don't fit into 32 bit
ints. Also, complex numbers can be ints as well. Also also, the
docstring talks about non-negative powers, but the code handles
negative ones as well.
_______________________________________________
Guile-devel mailing list
Guile-devel@gnu.org
http://mail.gnu.org/mailman/listinfo/guile-devel
next prev parent reply other threads:[~2002-03-13 19:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-13 8:36 real numbers and integer-expt Rob Browning
2002-03-13 19:23 ` Marius Vollmer [this message]
2002-03-13 21:23 ` Rob Browning
2002-03-13 21:32 ` Rob Browning
2002-03-13 21:48 ` Rob Browning
2002-03-20 22:32 ` Marius Vollmer
2002-03-20 22:54 ` Rob Browning
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=873cz4nuer.fsf@zagadka.ping.de \
--to=mvo@zagadka.ping.de \
--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).