From: Juri Linkov <juri@linkov.net>
To: Drew Adams <drew.adams@oracle.com>
Cc: Eli Zaretskii <eliz@gnu.org>,
Stefan Kangas <stefankangas@gmail.com>,
"emacs-devel@gnu.org" <emacs-devel@gnu.org>
Subject: Re: [External] : Re: master 927b885 1/3: Disable filtering of commands in M-x completion
Date: Thu, 18 Feb 2021 19:22:12 +0200 [thread overview]
Message-ID: <87a6s1e3a3.fsf@mail.linkov.net> (raw)
In-Reply-To: <SA2PR10MB4474BCAA9FCF73649B64B76AF3859@SA2PR10MB4474.namprd10.prod.outlook.com> (Drew Adams's message of "Thu, 18 Feb 2021 16:25:45 +0000")
>> > (defun foo (&optional beg end)
>> > (interactive "r")
>> > (message "FOO"))
>>
>> Yes, I'm sure. 'M-x foo RET' without an active region
>> raises an error:
>> command-execute: The mark is not active now
>
> I don't see that in Emacs 27.1 or prior (with
> `emacs -Q'). Is this perhaps new for 28?
> If so, why would we do that?
It raises an error because the value of
mark-even-if-inactive was changed to nil,
so the region exists only when explicitly activated.
>> This means that more complex interactive specs
>> need manual tagging using a new tag:
>> (declare (predicate (use-region-p)))
>
> But even that won't handle arbitrary `interactive'
> sexps, right?
`declare' could use the same logic used in `interactive'
that detects region boundaries.
>> Same tag:
>> (declare (predicate (not buffer-read-only)))
>
> And what about commands that might be usable
> interactively, but whose `interactive' spec
> doesn't encapsulate all that's involved? In that
> case, manual addition of a declaration will need
> to look into the logic of the command body as
> well. (Admittedly, such commands are uncommon.)
Yes, here it should share the same logic as well.
>> Using a prefix arg for 'C-h f' and 'C-h v' to limit the list
>> of completions would be nice.
>>
>> But I guess M-x can't use a prefix arg to limit completions?
>
> Why do you think so? `C-u M-x describe-function TAB'
> (with my definition from `help-fns+.el') shows only
> commands as candidates.
The docstring of `execute-extended-command' says:
To pass a prefix argument to the command you are invoking,
give a prefix argument to ‘execute-extended-command’.
And indeed `C-u M-x forward-char RET' moves 4 chars forwards.
So you can't use `C-u M-x TAB' to limit the number of completions.
Maybe then use another prefix like `C-x', i.e. `C-x M-x'?
This is similar to how `C-x M-:' combines the prefix `C-x'
to run `repeat-complex-command'.
next prev parent reply other threads:[~2021-02-18 17:22 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210217165944.26910.26583@vcs0.savannah.gnu.org>
[not found] ` <20210217165946.030D420DFC@vcs0.savannah.gnu.org>
2021-02-17 19:27 ` master 927b885 1/3: Disable filtering of commands in M-x completion Stefan Kangas
2021-02-17 20:01 ` Juri Linkov
2021-02-17 22:18 ` [External] : " Drew Adams
2021-02-18 9:33 ` Juri Linkov
2021-02-18 16:25 ` Drew Adams
2021-02-18 17:22 ` Juri Linkov [this message]
2021-02-18 18:24 ` Drew Adams
2021-02-18 19:03 ` Juri Linkov
2021-02-18 19:18 ` Drew Adams
2021-02-18 19:35 ` Eli Zaretskii
2021-02-18 19:47 ` Drew Adams
2021-02-18 19:58 ` Eli Zaretskii
2021-02-18 20:11 ` Drew Adams
2021-02-18 20:22 ` Drew Adams
2021-02-18 20:25 ` Eli Zaretskii
2021-02-18 20:45 ` Drew Adams
2021-02-19 13:17 ` Eli Zaretskii
2021-02-19 17:53 ` Drew Adams
2021-02-19 18:38 ` Eli Zaretskii
2021-02-18 23:15 ` martin rudalics
2021-02-18 23:32 ` Drew Adams
2021-02-19 8:37 ` Eli Zaretskii
2021-02-19 17:42 ` Drew Adams
2021-02-18 19:38 ` Eli Zaretskii
2021-02-18 19:49 ` Drew Adams
2021-02-18 19:58 ` Eli Zaretskii
2021-02-18 20:26 ` Drew Adams
2021-02-17 20:04 ` Eli Zaretskii
2021-02-17 20:31 ` Stefan Kangas
2021-02-17 20:12 ` [External] : " Drew Adams
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