unofficial mirror of bug-gnu-emacs@gnu.org 
 help / color / mirror / code / Atom feed
* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
@ 2020-04-13 11:19 Jean Louis
  2020-04-13 12:30 ` Eli Zaretskii
  0 siblings, 1 reply; 8+ messages in thread
From: Jean Louis @ 2020-04-13 11:19 UTC (permalink / raw)
  To: 40596


Here is something that could be a bug, I cannot know at this moment, as
I am researching yet if I can use &key with Emacs's `defun':

(defun tmp-function-1 (text html &key one)
  "This one works fine"
  (message one))

(tmp-function-1 "text" "<html>" :one "Hello")

(defun tmp-function-2 (text html &key one two)
  "This one does not work, wrong number of arguments"
  (message one))

(tmp-function-1 "text" "<html>" :one "Hello" :two "But not alright")

Evaluating the last function does not work, it gives the error:

Debugger entered--Lisp error: (wrong-number-of-arguments ((t) (text html &key one) "This one works fine" (message one)) 6)
  tmp-function-1("text" "<html>" :one "Hello" :two "But not alright")
  eval((tmp-function-1 "text" "<html>" :one "Hello" :two "But not alright") nil)
  elisp--eval-last-sexp(nil)
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  call-interactively(eval-last-sexp nil nil)
  command-execute(eval-last-sexp)

I have tried searching the manual for Emacs Lisp for anything related to
`&key' and I cannot find any references, in my opinion the description
of `defun' in the Emacs Lisp manual is not satisfactorily.

Jean



In GNU Emacs 28.0.50 (build 5, x86_64-pc-linux-gnu, X toolkit, cairo version 1.14.8, Xaw3d scroll bars)
 of 2020-03-28 built on protected.rcdrun.com
Repository revision: dceba13ce57ed0cb726e89566197f77359a38d91
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.11907000
System Description: Hyperbola GNU/Linux-libre

Recent messages:
Mark set
tmp-function-2
Entering debugger...
Back to top level
tmp-function-2
Entering debugger...
previous-line: Beginning of buffer [4 times]
Back to top level
kill-line: End of buffer [6 times]
Mark set

Configured using:
 'configure --prefix=/package/text/emacs-2020-03-28 --with-modules
 --without-gpm --with-x-toolkit=lucid
 PKG_CONFIG_PATH=/home/data1/protected/GNUstep/Library/Libraries/pkgconfig:/usr/lib/pkgconfig'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND DBUS GSETTINGS GLIB NOTIFY
INOTIFY ACL GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF ZLIB
TOOLKIT_SCROLL_BARS LUCID X11 XDBE XIM MODULES THREADS JSON PDUMPER
LCMS2 GMP

Important settings:
  value of $LC_ALL: de_DE.UTF-8
  value of $LANG: de_DE.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort hashcash mail-extr emacsbug message rmc puny dired
dired-loaddefs format-spec rfc822 mml mml-sec password-cache epa derived
epg epg-config gnus-util rmail rmail-loaddefs text-property-search
time-date subr-x seq byte-opt gv bytecomp byte-compile cconv mm-decode
mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
help-fns radix-tree cl-print debug backtrace help-mode easymenu
find-func cl-loaddefs cl-lib tooltip eldoc electric uniquify ediff-hook
vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd
tool-bar dnd fontset image regexp-opt fringe tabulated-list replace
newcomment text-mode elisp-mode lisp-mode prog-mode register page
tab-bar menu-bar rfn-eshadow isearch timer select scroll-bar mouse
jit-lock font-lock syntax facemenu font-core term/tty-colors frame
minibuffer cl-generic cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite charscript charprop case-table epa-hook jka-cmpr-hook help
simple abbrev obarray cl-preloaded nadvice loaddefs button faces
cus-face macroexp files text-properties overlay sha1 md5 base64 format
env code-pages mule custom widget hashtable-print-readable backquote
threads dbusbind inotify lcms2 dynamic-setting system-font-setting
font-render-setting cairo x-toolkit x multi-tty make-network-process
emacs)

Memory information:
((conses 16 52165 9031)
 (symbols 48 6514 1)
 (strings 32 18090 1316)
 (string-bytes 1 578502)
 (vectors 16 10940)
 (vector-slots 8 141658 11450)
 (floats 8 27 48)
 (intervals 56 546 84)
 (buffers 1000 13))

-- 
Thanks,
Jean Louis





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
  2020-04-13 11:19 bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error Jean Louis
@ 2020-04-13 12:30 ` Eli Zaretskii
  2020-04-13 13:02   ` Jean Louis
  0 siblings, 1 reply; 8+ messages in thread
From: Eli Zaretskii @ 2020-04-13 12:30 UTC (permalink / raw)
  To: Jean Louis; +Cc: 40596

> From: Jean Louis <bugs@gnu.support>
> Date: Mon, 13 Apr 2020 14:19:10 +0300
> 
> Here is something that could be a bug, I cannot know at this moment, as
> I am researching yet if I can use &key with Emacs's `defun':
> 
> (defun tmp-function-1 (text html &key one)
>   "This one works fine"
>   (message one))
> 
> (tmp-function-1 "text" "<html>" :one "Hello")
> 
> (defun tmp-function-2 (text html &key one two)
>   "This one does not work, wrong number of arguments"
>   (message one))
> 
> (tmp-function-1 "text" "<html>" :one "Hello" :two "But not alright")
> 
> Evaluating the last function does not work, it gives the error:

You need to use cl-defun, not defun.  The latter doesn't support &key.





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
  2020-04-13 12:30 ` Eli Zaretskii
@ 2020-04-13 13:02   ` Jean Louis
  2020-04-13 13:37     ` Eli Zaretskii
  0 siblings, 1 reply; 8+ messages in thread
From: Jean Louis @ 2020-04-13 13:02 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 40596

* Eli Zaretskii <eliz@gnu.org> [2020-04-13 15:31]:
> > From: Jean Louis <bugs@gnu.support>
> > Date: Mon, 13 Apr 2020 14:19:10 +0300
> > 
> > Here is something that could be a bug, I cannot know at this moment, as
> > I am researching yet if I can use &key with Emacs's `defun':
> > 
> > (defun tmp-function-1 (text html &key one)
> >   "This one works fine"
> >   (message one))
> > 
> > (tmp-function-1 "text" "<html>" :one "Hello")
> > 
> > (defun tmp-function-2 (text html &key one two)
> >   "This one does not work, wrong number of arguments"
> >   (message one))
> > 
> > (tmp-function-1 "text" "<html>" :one "Hello" :two "But not alright")
> > 
> > Evaluating the last function does not work, it gives the error:
> 
> You need to use cl-defun, not defun.  The latter doesn't support &key.

I understand and not that I need it. Then if the Emacs Lisp `defun'
does not support &key, why is then this below working?

(defun tmp-function-1 (text html &key one)
  "This one works fine"
  (message one))

(tmp-function-1 "text" "<html>" :one "Hello")

It should not work, if Emacs Lisp does not support &key

Isn't it?

Jean





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
  2020-04-13 13:02   ` Jean Louis
@ 2020-04-13 13:37     ` Eli Zaretskii
  2020-04-13 13:43       ` Jean Louis
  0 siblings, 1 reply; 8+ messages in thread
From: Eli Zaretskii @ 2020-04-13 13:37 UTC (permalink / raw)
  To: Jean Louis; +Cc: 40596

> Date: Mon, 13 Apr 2020 16:02:30 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: 40596@debbugs.gnu.org
> 
> I understand and not that I need it. Then if the Emacs Lisp `defun'
> does not support &key, why is then this below working?
> 
> (defun tmp-function-1 (text html &key one)
>   "This one works fine"
>   (message one))
> 
> (tmp-function-1 "text" "<html>" :one "Hello")

I think it interprets &key as a name of a simple argument.





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
  2020-04-13 13:37     ` Eli Zaretskii
@ 2020-04-13 13:43       ` Jean Louis
  2020-04-13 13:57         ` Eli Zaretskii
  0 siblings, 1 reply; 8+ messages in thread
From: Jean Louis @ 2020-04-13 13:43 UTC (permalink / raw)
  To: Eli Zaretskii; +Cc: 40596

* Eli Zaretskii <eliz@gnu.org> [2020-04-13 16:38]:
> > Date: Mon, 13 Apr 2020 16:02:30 +0300
> > From: Jean Louis <bugs@gnu.support>
> > Cc: 40596@debbugs.gnu.org
> > 
> > I understand and not that I need it. Then if the Emacs Lisp `defun'
> > does not support &key, why is then this below working?
> > 
> > (defun tmp-function-1 (text html &key one)
> >   "This one works fine"
> >   (message one))
> > 
> > (tmp-function-1 "text" "<html>" :one "Hello")
> 
> I think it interprets &key as a name of a simple argument.

A yes, close.





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
  2020-04-13 13:43       ` Jean Louis
@ 2020-04-13 13:57         ` Eli Zaretskii
  0 siblings, 0 replies; 8+ messages in thread
From: Eli Zaretskii @ 2020-04-13 13:57 UTC (permalink / raw)
  To: Jean Louis; +Cc: 40596-done

> Date: Mon, 13 Apr 2020 16:43:49 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: 40596@debbugs.gnu.org
> 
> > > (tmp-function-1 "text" "<html>" :one "Hello")
> > 
> > I think it interprets &key as a name of a simple argument.
> 
> A yes, close.

Done.





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
       [not found]     ` <<83y2qzik0g.fsf@gnu.org>
@ 2020-04-13 15:01       ` Drew Adams
  2020-04-14  2:16         ` Richard Stallman
  0 siblings, 1 reply; 8+ messages in thread
From: Drew Adams @ 2020-04-13 15:01 UTC (permalink / raw)
  To: Eli Zaretskii, Jean Louis; +Cc: 40596

> I think it interprets &key as a name of a simple argument.

This can be a gotcha, for someone coming from
another Lisp dialect that supports lambda lists
with &key.

Perhaps Emacs Lisp could post a warning (e.g. from
the byte-compiler) if a lambda list uses one of the
`&' keywords supported by, say, Common Lisp (&key,
&aux, &allow-other-keys)?





^ permalink raw reply	[flat|nested] 8+ messages in thread

* bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error
  2020-04-13 15:01       ` Drew Adams
@ 2020-04-14  2:16         ` Richard Stallman
  0 siblings, 0 replies; 8+ messages in thread
From: Richard Stallman @ 2020-04-14  2:16 UTC (permalink / raw)
  To: Drew Adams; +Cc: bugs, 40596

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

  > Perhaps Emacs Lisp could post a warning (e.g. from
  > the byte-compiler) if a lambda list uses one of the
  > `&' keywords supported by, say, Common Lisp (&key,
  > &aux, &allow-other-keys)?

I think that is a good idea.

-- 
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)







^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2020-04-14  2:16 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-04-13 11:19 bug#40596: 28.0.50; Function with more than one key gives "wrong number of arguments" error Jean Louis
2020-04-13 12:30 ` Eli Zaretskii
2020-04-13 13:02   ` Jean Louis
2020-04-13 13:37     ` Eli Zaretskii
2020-04-13 13:43       ` Jean Louis
2020-04-13 13:57         ` Eli Zaretskii
     [not found] <<86ftd78wgh.fsf@protected.rcdrun.com>
     [not found] ` <<831rork1pe.fsf@gnu.org>
     [not found]   ` <<20200413130230.GG15872@protected.rcdrun.com>
     [not found]     ` <<83y2qzik0g.fsf@gnu.org>
2020-04-13 15:01       ` Drew Adams
2020-04-14  2:16         ` Richard Stallman

Code repositories for project(s) associated with this public inbox

	https://git.savannah.gnu.org/cgit/emacs.git

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).