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bug#22324: 25.0.50; completion-category-defaults style doesn't override
From: |
Daniel Mendler |
Subject: |
bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead) |
Date: |
Wed, 26 Jan 2022 14:49:48 +0100 |
> We can probably have our cake and eat it too by adding a `fail`
> completion style. Such a style would always take responsibility
> (i.e. would never return nil to delegate to subsequent styles), but
> would always return a "useless" value that gives no completions.
>
> Then entries in `completion-category-override/defaults` could choose to
> either be mere additions to the global default (as now) or be a full
> override (which they'd get by having this `fail` style at the end).
This sounds like a good idea to solve the issue and retain backward
compatibility. It is like eating the cake backwards :) A `fail'
completion style is pretty trivial. It boils down to adding `(fail
ignore ignore "Fail with no completions")` to the
`completion-styles-alist`, or did I miss something?
>> Furthermore we've also got `completion-category-defaults`. It may make
>> sense to distinguish them by making the override a real override and
>> keep the current behavior for the defaults.
>
> No, the role of those two is already quite different:
> `completion-category-defaults` is for packages to set, whereas
> `completion-category-override` is to be set by end-users.
I am aware of this distinction, but I chose to ignore it. Calling it
"quite different" feels like an exaggeration, given that Emacs is
supposed to be configurable throughout by the user - of course this is
only my interpretation. I usually override
`completion-category-defaults` since I want to control the completion
precisely myself and I don't like if packages interfere with that. But
this is probably a special preference of someone who wrote multiple
completion UIs and likes to tweak the Orderless matching behavior... ;)
As far as I know `completion-category-defaults` is not used widely. I
don't have a single package installed which makes use of this
functionality, but once again, this is probably not representative.
Daniel
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Lars Ingebrigtsen, 2022/01/21
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Dmitry Gutov, 2022/01/23
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Lars Ingebrigtsen, 2022/01/24
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Dmitry Gutov, 2022/01/24
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Lars Ingebrigtsen, 2022/01/25
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Dmitry Gutov, 2022/01/25
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Daniel Mendler, 2022/01/25
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Stefan Monnier, 2022/01/26
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead),
Daniel Mendler <=
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Stefan Monnier, 2022/01/26
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Daniel Mendler, 2022/01/26
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Stefan Monnier, 2022/01/26
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Daniel Mendler, 2022/01/26
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Stefan Monnier, 2022/01/27
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Dmitry Gutov, 2022/01/27
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Daniel Mendler, 2022/01/28
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Stefan Monnier, 2022/01/28
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Dmitry Gutov, 2022/01/28
- bug#22324: 25.0.50; completion-category-defaults style doesn't override completion-styles (gets prepended instead), Stefan Monnier, 2022/01/28