From: Emanuel Berg <embe8573@student.uu.se>
To: help-gnu-emacs@gnu.org
Subject: no empty (zero) string predicate in Elisp
Date: Sat, 25 Apr 2015 05:44:06 +0200 [thread overview]
Message-ID: <87h9s4rhx5.fsf@debian.uxu> (raw)
In one of my w3m extensions [1] I have
(defun empty-string-p (str)
(string= str "") )
which obviously has nothing to do with w3m. Well, it's
been known to happen. I can live with having it there.
However, the next time I want to use it in some other
file the byte-compiler tells me
In end of data: wrap-search.el:98:1:Warning: the
function `empty-string-p' is not known to
be defined.
OK, I get that away with
(require 'w3m-unisearch) ; get empty-string-p
But now I have a mention of w3m, in a file that has
nothing to do with w3m, to get empty-string-p, which
has nothing to do with w3m!
Of course, I can do yet a third file -
my-string-predicate.el - and require that from both
files. But I feel I shouldn't have to. Such basic
things shouldn't have to be solved on a Joe Hacker
basis. It should be included. And not in ELPA,
in Emacs!
I'll report this as a bug unless someone presents
really convincing stuff why it shouldn't be included.
Or, if there is something equivalent - equivalent in
the syntactic sense, I mean - I am aware of
(= (length str) 0)
and
(equal "" str)
but it should be a binary operator.
[1] http://user.it.uu.se/~embe8573/conf/emacs-init/w3m/w3m-unisearch.el
--
underground experts united
http://user.it.uu.se/~embe8573
next reply other threads:[~2015-04-25 3:44 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-25 3:44 Emanuel Berg [this message]
2015-04-25 9:26 ` no empty (zero) string predicate in Elisp Nicolas Petton
2015-05-16 9:23 ` Nicolas Petton
2015-05-16 13:22 ` Bozhidar Batsov
2015-05-16 13:28 ` Bozhidar Batsov
2015-05-16 13:36 ` Bozhidar Batsov
2015-05-16 13:46 ` Eli Zaretskii
2015-05-16 16:17 ` Bozhidar Batsov
2015-05-16 13:43 ` Stefan Monnier
2015-05-16 15:27 ` Drew Adams
[not found] ` <mailman.1583.1429954907.904.help-gnu-emacs@gnu.org>
2015-04-25 11:22 ` Emanuel Berg
2015-04-25 13:30 ` Stefan Monnier
[not found] ` <mailman.1591.1429968677.904.help-gnu-emacs@gnu.org>
2015-04-25 14:48 ` Pascal J. Bourguignon
2015-04-26 2:52 ` Stefan Monnier
2015-04-27 10:28 ` zerop: compiler macro vs defsubst (was: no empty (zero) string predicate in Elisp) Nicolas Richard
2015-04-27 12:19 ` zerop: compiler macro vs defsubst Stefan Monnier
[not found] ` <mailman.1626.1430016741.904.help-gnu-emacs@gnu.org>
2015-04-26 4:06 ` no empty (zero) string predicate in Elisp Pascal J. Bourguignon
2015-04-26 21:25 ` Stefan Monnier
2015-04-26 4:26 ` Rusi
2015-04-26 12:36 ` Emanuel Berg
2015-04-26 15:03 ` Pascal J. Bourguignon
2015-04-26 18:34 ` Emanuel Berg
2015-04-26 18:59 ` Marcin Borkowski
[not found] ` <mailman.1658.1430074770.904.help-gnu-emacs@gnu.org>
2015-04-26 19:06 ` Emanuel Berg
2015-04-26 20:11 ` Marcin Borkowski
[not found] ` <mailman.1662.1430079142.904.help-gnu-emacs@gnu.org>
2015-04-27 1:00 ` Emanuel Berg
2015-04-26 17:28 ` Rusi
2015-04-26 18:39 ` Emanuel Berg
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