From: "Stefan Monnier" <monnier+gnu/emacs@rum.cs.yale.edu>
Cc: "Emacs-Devel \(E-mail\)" <emacs-devel@gnu.org>
Subject: Re: New function `emacs-version>='
Date: Fri, 02 May 2003 17:14:07 -0400 [thread overview]
Message-ID: <200305022114.h42LE8PH022578@rum.cs.yale.edu> (raw)
In-Reply-To: 20030502224227.C2FC.LEKTU@terra.es
> but the right test is:
>
> - I want to use feature/fix A
> - therefore, I test whether A is available.
I think Christoph knows that. It's just that sometimes it's difficult
to test whether A works or not. For instance, how do you check whether
the `display' property is supported by your version of Emacs ?
How do you test whether PNG images are supported (without actually
displaying such an image) ? ...
In most cases, there's a better solution than testing emacs-version, but
there are still some where testing emacs-version makes sense and furthermore
people do it anyway, so I'd rather provide an `emacs-version>=' rather than
see something fail in Emacs-21 because some idiot wrote
(or (= 20 emacs-major-version) (>= 29 emacs-minor-version)).
And then we can make bytecomp.el emit warning messages about
how you shouldn't use that function ;-)
Stefan
next prev parent reply other threads:[~2003-05-02 21:14 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-05-02 19:55 [Suggestion] New function `emacs-version>=' Wedler, Christoph
2003-05-02 21:00 ` Juanma Barranquero
2003-05-02 21:14 ` Stefan Monnier [this message]
2003-05-02 21:35 ` Juanma Barranquero
2003-05-03 11:12 ` Ehud Karni
2003-05-03 13:54 ` Juanma Barranquero
2003-05-03 16:08 ` Stephen J. Turnbull
2003-05-04 19:15 ` Juanma Barranquero
2003-05-06 11:05 ` Stephen J. Turnbull
2003-05-04 13:04 ` Richard Stallman
2003-05-03 17:48 ` Reiner Steib
2003-05-03 18:42 ` Stefan Monnier
2003-05-05 13:47 ` sort-coding-systems in 21.3 and RC branch (was: New function `emacs-version>=') Reiner Steib
2003-05-06 7:08 ` Kenichi Handa
2003-05-02 21:16 ` [Suggestion] New function `emacs-version>=' Thien-Thi Nguyen
2003-05-04 13:03 ` Richard Stallman
2003-05-05 12:52 ` Wedler, Christoph
2003-05-05 13:20 ` Juanma Barranquero
2003-05-05 19:11 ` Richard Stallman
2003-05-05 21:59 ` Luc Teirlinck
2003-05-06 23:42 ` Istvan Marko
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