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Re: Canonical way to add a pre-filter to completing-read
From: |
Stefan Monnier |
Subject: |
Re: Canonical way to add a pre-filter to completing-read |
Date: |
Thu, 10 May 2018 11:21:42 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
> (completing-read "Entry: " '("abc" "bcd" "cde") nil :require-match "bc")
> ;INITIAL-INPUT deprecated, but works as I want
>
> Above will show in the completion list with just the filtered items
> matching "bc":
>
> abc
> bcd
Could you clarify exactly here:
- "will show"... when the user does what?
Just calling the above `completing-read` won't show any list of completions
- When I hit ? at the prompt, I indeed get a list of completions, but
that list only includes `bcd` because the default completion style
does not include `substring`. So your use/test case is different from
the default.
Let's say the user does
M-: (km-completion "Entry: " '("abc" "bcd" "cde") "bc") RET
and then types `a` (and then hits `?` to see the list of remaining
completions, or maybe he uses icomplete-mode to always see the list of
remaining candidates). What do you want the list of completions to be
at that point?
Some things you can do with the standard completion-UI:
- setup your completion table such that it uses `substring` completion
by default.
- use `completion-table-in-turn` with the first table being a sub-table
which only includes the entries that match "bc".
-- Stefan