From: Juri Linkov <juri@linkov.net>
To: Spencer Baugh <sbaugh@catern.com>
Cc: Spencer Baugh <sbaugh@janestreet.com>, emacs-devel@gnu.org
Subject: Re: Turning completion table lambdas into symbols
Date: Wed, 29 Nov 2023 09:18:46 +0200 [thread overview]
Message-ID: <865y1lt5hh.fsf@mail.linkov.net> (raw)
In-Reply-To: <87a5qxv4bh.fsf@catern.com> (Spencer Baugh's message of "Tue, 28 Nov 2023 23:36:44 +0000 (UTC)")
>>>> display-buffer has a similar problem, but the difference is that
>>>> it's possible to identify a buffer by its name and use a regexp
>>>> to match buffer names. Whereas for completing-read it's not easy
>>>> to identify a completion table. A category matches a set of
>>>> completion tables, so maybe we need another identification
>>>> for individual tables?
>>>
>>> True, that would help. Maybe the function symbol for the completion
>>> table? Tables are usually lambdas today, but maybe we could make it
>>> easy to use a defun'd function instead, which would be very good for
>>> comprehensibility in general IMO.
>>
>> Turning lambdas into symbols looks good, this is like the existing
>> 'help--symbol-completion-table'.
>
> Like 'help--symbol-completion-table' in what way?
Just an example where minibuffer-completion-table is a symbol.
> One thing that requires a lambda is when the table is over some custom
> data. But that can sometimes be avoided by moving the logic into the
> table, like this for example:
>
> +(defun project--project-dir-completion-table (string pred action)
> + (cond
> + ((eq action 'metadata)
> + '(metadata . ((category . project-dir))))
> + (t
> + (complete-with-action action (cons "... (choose a dir)" project--list) string pred))))
> ...
> - (completing-read "Select project: " choices nil t nil 'project--dir-history))))
> + (completing-read "Select project: " #'project--project-dir-completion-table
> + nil t nil 'project--dir-history))))
> If there was a canonical way for a completion table to maintain some
> state which *doesn't* require the completion table to be a lambda, I
> think most completion tables could become defuns instead of lambdas.
> (And then they could be customized based on the function symbol)
Or they could be customized based on a new symbol for table identification
without turning lambdas into defuns:
(completing-read "Select project: "
(lambda (string pred action)
(cond
((eq action 'metadata)
'(metadata
. ((category . project-dir)
(table . project-dir-completion-table))))
(t
(complete-with-action action choices string pred))))
nil t nil 'project--dir-history)
next prev parent reply other threads:[~2023-11-29 7:18 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-12 23:53 Updating *Completions* as you type sbaugh
2023-10-13 6:31 ` Eli Zaretskii
2023-10-13 18:01 ` Spencer Baugh
2023-10-14 7:09 ` Eli Zaretskii
2023-10-14 19:26 ` Björn Bidar
[not found] ` <874jit2ef7.fsf@>
2023-10-14 19:38 ` Eli Zaretskii
2023-10-14 16:51 ` Juri Linkov
2023-10-14 17:56 ` sbaugh
2023-10-14 19:51 ` Dmitry Gutov
2023-10-13 6:34 ` Juri Linkov
2023-10-13 19:04 ` Spencer Baugh
2023-10-14 16:58 ` Juri Linkov
2023-10-14 20:05 ` sbaugh
2023-10-15 6:06 ` Eli Zaretskii
2023-10-15 15:55 ` sbaugh
2023-10-16 11:38 ` Eli Zaretskii
2023-10-16 14:50 ` Michael Albinus
2023-10-16 15:58 ` [External] : " Drew Adams
2023-10-16 12:16 ` sbaugh
2023-10-17 18:23 ` Juri Linkov
2023-10-18 23:27 ` Spencer Baugh
2023-10-15 7:32 ` Juri Linkov
2023-10-16 19:28 ` Rudolf Adamkovič
2023-10-17 18:38 ` Juri Linkov
2023-10-15 20:31 ` Eshel Yaron
2023-10-16 3:18 ` [External] : " Drew Adams
2023-10-16 16:54 ` Juri Linkov
2023-10-17 13:48 ` sbaugh
2023-10-17 18:35 ` Juri Linkov
2023-10-17 22:57 ` Spencer Baugh
2023-10-18 3:04 ` [External] : " Drew Adams
2023-10-18 6:56 ` Juri Linkov
2023-10-18 12:25 ` Spencer Baugh
2023-10-18 17:32 ` Juri Linkov
2023-10-18 23:33 ` Spencer Baugh
2023-10-19 2:29 ` Spencer Baugh
2023-10-19 6:55 ` Juri Linkov
2023-11-19 19:22 ` sbaugh
2023-11-20 7:51 ` Juri Linkov
2023-11-20 15:24 ` Spencer Baugh
2023-11-20 17:47 ` Juri Linkov
2023-11-20 18:50 ` Spencer Baugh
2023-11-21 7:58 ` Juri Linkov
2023-11-21 12:40 ` sbaugh
2023-11-21 17:09 ` Juri Linkov
2023-11-21 20:45 ` Spencer Baugh
2023-11-22 7:51 ` Juri Linkov
2023-11-22 16:11 ` Spencer Baugh
2023-11-23 7:58 ` Juri Linkov
2023-11-23 12:36 ` sbaugh
2023-11-24 7:58 ` Juri Linkov
2023-11-25 16:44 ` Spencer Baugh
2023-11-25 18:31 ` Juri Linkov
2023-11-26 13:33 ` sbaugh
2023-11-27 7:28 ` Juri Linkov
2023-11-28 14:38 ` Spencer Baugh
2023-11-28 15:03 ` Eli Zaretskii
2023-11-28 17:13 ` Juri Linkov
2023-11-28 17:36 ` Eli Zaretskii
2023-11-29 7:11 ` Juri Linkov
2023-11-29 13:09 ` Eli Zaretskii
2023-11-29 14:14 ` Spencer Baugh
2023-11-29 14:54 ` Eli Zaretskii
2023-11-29 15:21 ` Spencer Baugh
2023-11-29 15:52 ` Eli Zaretskii
2023-11-29 19:17 ` Spencer Baugh
2023-11-30 6:12 ` Eli Zaretskii
2023-11-30 12:33 ` Spencer Baugh
2023-11-30 14:10 ` Eli Zaretskii
2023-11-28 23:56 ` Spencer Baugh
2023-11-29 3:33 ` Eli Zaretskii
2023-12-03 17:25 ` Juri Linkov
2023-12-03 17:56 ` Eli Zaretskii
2023-12-06 17:17 ` Juri Linkov
2023-11-28 17:16 ` Juri Linkov
2023-11-28 23:36 ` Turning completion table lambdas into symbols Spencer Baugh
2023-11-28 23:51 ` Dmitry Gutov
2023-11-29 19:26 ` Spencer Baugh
2023-12-01 0:36 ` Dmitry Gutov
2023-11-29 7:18 ` Juri Linkov [this message]
2023-11-21 12:54 ` Updating *Completions* as you type John Yates
2023-11-21 17:03 ` Juri Linkov
2023-11-21 22:27 ` John Yates
2023-10-20 6:49 ` Juri Linkov
2023-10-17 15:01 ` sbaugh
2023-10-17 18:20 ` Juri Linkov
2023-10-17 23:37 ` Spencer Baugh
2023-10-17 23:44 ` Spencer Baugh
2023-10-18 6:51 ` Juri Linkov
2023-10-18 12:47 ` Spencer Baugh
2023-10-18 17:28 ` Juri Linkov
2023-10-18 23:32 ` Spencer Baugh
2023-10-16 3:19 ` [External] : " Drew Adams
2023-10-20 9:35 ` zcomplete Philip Kaludercic
2023-10-22 17:28 ` zcomplete Juri Linkov
2023-10-23 5:00 ` zcomplete Protesilaos Stavrou
2023-10-23 6:45 ` zcomplete Juri Linkov
2023-10-13 18:11 ` Updating *Completions* as you type Daniel Semyonov
2023-10-13 18:48 ` Spencer Baugh
2023-10-16 3:16 ` [External] : " Drew Adams
2023-10-16 9:25 ` Philip Kaludercic
2023-10-16 16:03 ` Drew Adams
2023-10-20 7:45 ` Philip Kaludercic
2023-10-20 16:10 ` Drew Adams
2023-10-16 22:55 ` Emanuel Berg
2023-10-17 6:09 ` Emanuel Berg
2023-10-17 0:44 ` Michael Heerdegen
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