From: Jay Belanger <jay.p.belanger@gmail.com>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: jay.p.belanger@gmail.com, bug-gnu-emacs@gnu.org,
Francis Litterio <flitterio@gmail.com>,
emacs-devel@gnu.org
Subject: Re: In CVS Emacs, calc-eval gives multiplication higher precidence than division
Date: Sun, 07 Sep 2008 15:35:37 -0500 [thread overview]
Message-ID: <873akbitie.fsf@gmail.com> (raw)
In-Reply-To: <jwv4p4r213l.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Sun, 07 Sep 2008 15:46:52 -0400")
>> That's not a bug. While many systems give division a higher precendence
>> than multiplication, that isn't a universal rule.
>
> Actually, I don't know of any system that gives higher precedence to
> division.
According to Wikipedia:
An expression like 1/2x is interpreted as 1/(2x) by TI-82, but as
(1/2)x by TI-83. While the first interpretation may be expected by
some users, only the latter is in agreement with the standard rules
stated above.
> The general rule that (AFAIK) all programming languages
> follow (other than those that don't use infix-with-precedence, such as
> Lisp and Smalltalk) is that * and / have the same precedence (and are
> left associative).
That behavior is available, but you have to ask for it by setting
`calc-multiplication-has-precedence' to nil.
next prev parent reply other threads:[~2008-09-07 20:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-07 16:06 In CVS Emacs, calc-eval gives multiplication higher precidence than division Francis Litterio
2008-09-07 16:37 ` Jay Belanger
2008-09-07 18:15 ` Francis Litterio
2008-09-07 19:46 ` Stefan Monnier
2008-09-07 20:19 ` bug#920: " Lennart Borgman (gmail)
2008-09-07 20:32 ` Randal L. Schwartz
2008-09-08 10:30 ` Carsten Dominik
2008-09-08 11:01 ` Lennart Borgman
2008-09-08 20:33 ` Carsten Dominik
2008-09-08 20:39 ` Lennart Borgman (gmail)
2008-09-08 20:43 ` Randal L. Schwartz
2008-09-08 20:53 ` bug#914: " Lennart Borgman (gmail)
2008-09-08 21:42 ` Stefan Monnier
2008-09-09 8:11 ` Richard M. Stallman
2008-09-09 13:26 ` Stefan Monnier
2008-09-08 13:01 ` Stefan Monnier
2008-09-07 20:35 ` Jay Belanger [this message]
2008-09-07 21:15 ` Stefan Monnier
2008-09-07 21:19 ` Lennart Borgman (gmail)
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