bug#47711: bug#48841: bug#47711: bug#48841: bug#47711: [PATCH VERSION 2] Add new `completion-filter-completions` API and deferred highlighting

[Howard Melman <hmelman@gmail.com>]

Dmitry Gutov <dmitry@gutov.dev> writes:

> On 02/11/2023 18:09, João Távora wrote:
>> On Thu, Nov 2, 2023 at 4:03 PM Dmitry Gutov<dmitry@gutov.dev>  wrote:
>> 
>>>> That's debatable, I like to be able to type 'vcdiff' and
>>>> see all the commands that vc.el offers for diffing things.
>>> That also works for Orderless and "vc dif".
>> Ah, but the order in which all these commands appear is
>> arbitrary, if I understand correctly.  It must be, since
>> there's no sorting, right?
>
> Seems so.

FYI, it's true that orderless just does filtering, it's just a
completion-style and leaves sorting to the completion UI
(I use it with vertico, but others work too).

It's configurable so what people can input can vary a lot,
but the main feature is that each space-separated bit is used
in any order.  So in the above example "vc dif" and "dif vc"
would both work.  The second is unlikely in this example
but it's far more useful when searching for function or
variable names.

The other great feature is that each "word" can be evaluated
in different ways, I typically use them as regexps, but it's
also easy to add syntax.  It's common to make a leading ! in
a word mean "without".  So an input of "file !--" would
match all things that include file anywhere and doesn't
have -- anywhere.  "^rx- !--" matches everything in the
public rx API (well anything beginning with rx- without --).

-- 

Howard