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Subject: |
25.0.50; `setq' with only one argument |
Date: |
Wed, 1 Apr 2015 07:53:36 -0700 (PDT) |
See for example: `(setq mark-active)' in `compilation-goto-locus'
(compile.el).
setq' should not be called with only one argument. It "works", with the
effect of assigning a value of nil, but it is poor form. Typically this
is a sign of a typo.
Beyond this particular occurrence, I think that a wrong-number-of-args
error should be raised when `setq' is called with an odd number of
arguments. That certainly corresponds to the syntax that is documented.
And it corresponds to the doc explanations that using `setq' is the same
as using `set' and quoting the variable. And it corresponds to the
definition and behavior of `setq' in Common Lisp.
In GNU Emacs 25.0.50.1 (i686-pc-mingw32)
of 2014-10-20 on LEG570
Bzr revision: 118168 address@hidden
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
`configure --enable-checking=yes,glyphs CPPFLAGS=-DGLYPH_DEBUG=1'
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--- Begin Message ---
Subject: |
Re: bug#20241: 25.0.50; `setq' with only one argument |
Date: |
23 Nov 2015 14:31:12 -0000 |
User-agent: |
tin/2.3.1-20141224 ("Tallant") (UNIX) (FreeBSD/10.1-RELEASE-p16 (amd64)) |
In article <address@hidden> you wrote:
> See for example: `(setq mark-active)' in `compilation-goto-locus'
> (compile.el).
> setq' should not be called with only one argument. It "works", with the
> effect of assigning a value of nil, but it is poor form. Typically this
> is a sign of a typo.
Fixed in emacs-25. The interpreter now signals a wrong-number-of-args
error, and the byte compiler issues a warning.
--
Alan Mackenzie (Nuremberg, Germany).
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