* 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:
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emacs)
Memory information:
((conses 16 52165 9031)
(symbols 48 6514 1)
(strings 32 18090 1316)
(string-bytes 1 578502)
(vectors 16 10940)
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(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
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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
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2020-04-13 15:01 ` Drew Adams
2020-04-14 2:16 ` Richard Stallman
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