From: "Drew Adams" <drew.adams@oracle.com>
To: "'Eli Zaretskii'" <eliz@gnu.org>,
"'Helmut Eller'" <eller.helmut@gmail.com>
Cc: emacs-devel@gnu.org
Subject: RE: e and pi
Date: Sat, 18 Sep 2010 08:11:02 -0700 [thread overview]
Message-ID: <54579AB56C064DFC9C36C8F914E03830@us.oracle.com> (raw)
In-Reply-To: <83hbhnz7z2.fsf@gnu.org>
> > I once had a function with an argument called system-name. Suddenly
> > Emacs started to complain that some files are locked by
> > some other user. How many people now that system-name is a global
> > variable and used by the file-locking code?
> >
> > The lesson is that Emacs should not pre-define global variables with
> > names that are likely candidates for local variables.
>
> What you describe as a big surprise is actually known to every C/C++
> programmer: some names are "reserved by the implementation" and should
> not be used by the application code.
And can you imagine the fun if C/C++ reserved the name `e'? ;-)
Please read what the OP wrote: "should not pre-define global variables with
names that are _likely candidates for local variables_". That likelihood is
very high for `e', whether in C/C++ or Emacs Lisp. It is presumably not so high
for the implementation-reserved names of C/C++. (And since when did their
design become a guide for Emacs Lisp?)
next prev parent reply other threads:[~2010-09-18 15:11 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-16 13:25 e and pi Stefan Monnier
2010-09-16 13:44 ` Deniz Dogan
2010-09-16 15:37 ` Stefan Monnier
2010-09-16 13:47 ` Leo
2010-09-16 15:39 ` Stefan Monnier
2010-09-16 14:27 ` Helmut Eller
2010-09-16 15:44 ` Stefan Monnier
2010-09-16 18:52 ` Helmut Eller
2010-09-16 14:44 ` Jason Rumney
2010-09-16 22:54 ` Chong Yidong
2010-09-17 0:04 ` Deniz Dogan
2010-09-17 0:14 ` Wojciech Meyer
2010-09-17 7:00 ` David Kastrup
2010-09-17 8:09 ` Simon Leinen
2010-09-17 8:15 ` David Kastrup
2010-09-17 9:06 ` Stephen J. Turnbull
2010-09-17 9:21 ` David Kastrup
2010-09-17 9:47 ` Helmut Eller
2010-09-17 15:11 ` Stefan Monnier
2010-09-17 15:22 ` Lars Magne Ingebrigtsen
2010-09-17 15:56 ` Helmut Eller
2010-09-17 22:13 ` Stefan Monnier
2010-09-17 15:44 ` Wojciech Meyer
2010-09-17 15:50 ` Chong Yidong
2010-09-17 16:06 ` Wojciech Meyer
2010-09-17 16:18 ` Helmut Eller
2010-09-17 16:45 ` Glenn Morris
2010-09-17 17:14 ` Glenn Morris
2010-09-18 10:01 ` Eli Zaretskii
2010-09-18 10:21 ` Helmut Eller
2010-09-18 11:07 ` Eli Zaretskii
2010-09-18 11:26 ` Helmut Eller
2010-09-18 10:50 ` David Kastrup
2010-09-18 11:09 ` Eli Zaretskii
2010-09-18 14:27 ` Stephen J. Turnbull
2010-09-18 14:32 ` Andreas Schwab
2010-09-18 15:11 ` Drew Adams [this message]
2010-09-17 22:17 ` Stefan Monnier
2010-09-18 1:10 ` Chong Yidong
2010-09-18 8:30 ` Stefan Monnier
2010-09-18 19:10 ` Chong Yidong
2010-09-18 21:37 ` Uday S Reddy
2010-09-19 0:57 ` Drew Adams
2010-09-18 13:43 ` Juanma Barranquero
2010-09-18 14:53 ` Stefan Monnier
2010-09-18 15:01 ` Lars Magne Ingebrigtsen
2010-09-18 16:00 ` Stefan Monnier
2010-09-19 10:07 ` Juanma Barranquero
2010-09-17 16:14 ` Drew Adams
2010-09-18 15:12 ` tomas
2010-09-18 17:52 ` David Kastrup
2010-09-19 19:13 ` tomas
2010-09-17 23:35 ` Uday S Reddy
2010-09-17 16:55 ` Sam Steingold
2010-09-17 22:16 ` Stefan Monnier
2010-09-17 22:55 ` Drew Adams
-- strict thread matches above, loose matches on Subject: below --
2010-09-17 4:20 MON KEY
2010-09-18 5:58 MON KEY
2010-09-18 14:50 ` Stefan Monnier
2010-09-19 2:03 ` MON KEY
2010-09-18 16:07 ` David De La Harpe Golden
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
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=54579AB56C064DFC9C36C8F914E03830@us.oracle.com \
--to=drew.adams@oracle.com \
--cc=eliz@gnu.org \
--cc=eller.helmut@gmail.com \
--cc=emacs-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.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.