B.t.w. Drew in his info+.el implemented a bit more fancy search using
`apropos-parse-pattern` from apropos.el.
I am not yet familiar with its exact functionality (although he explains it
in his docstring), but it could be a nice improvement.
However, I expect that my current implementation would be fine for 99% of
my PERSONAL use cases...

Also, I have available the even fancier `Info-occur` about which I informed
you already.
As a very short additional explanation about that function, I mention that
it uses Emacs its bookmarks functionality to
store and find matches.

On Tue, 25 May 2021 at 16:12, dalanicolai <dalanicolai@gmail.com> wrote:

> Ah, that is a pity. Well then I will send my proposal here. I am not sure
> how
> I could best approach this. I have a proposal ready, but I don't want to
> put
> in too much effort, before getting any feedback about my plan/general
> proposal.
>
> So to start I will attach my code in a file here, but I would like to hear
> how/in
> what form I am expected to send the code (in this case for getting feedback
> on the general plan).
>
> Here is a small explanation to the code:
>
> - The first function (`info-list-all`) creates a list of manuals, or with
> a non-nil
> value for the TOPICS argument, a list of topics in the Info dir file.
> - The second function (`info-topic-list-all`) creates a list of all
> manuals under
> some topic.
>
> The 'boiler plate code' for these two function was taken from the
> `Info-apropos-matches` function.
> These two functions can be used to create a list of manuals that can be
> passed
> to the (new) `info-apropos` for search.
>
>
> Then there is a (rudimentary) defcustom `Info-apropos-default-manuals` that
> takes as default value all manuals under topic 'Emacs' in the Info dir
> file.
> I would argue that this is a better than searching all manuals on the
> system.
> An alternative default could be searching only the Emacs and Elisp manuals.
>
> But searching all Emacs manuals doesn't take too long here.
> With the default value of `Info-apropos-default-manuals` (i.e.
> search all manuals under topic "Emacs")
> `(benchmark nil (info-apropos "function" t))` messages only 0.000002s ;)
> (Is this to be expected or is it a bug?)
>
> I am not sure how to handle startup with its default value of
> `(info-topic-list-all "Emacs")`, as that function opens the Info buffer.
>
>
> Then there is the working horse function of `info-apropos` i.e.
> `Info-apropos-matches` which is just the original one taken from info.el
> but
> with the small modification that it can take a list of manuals, and only
> searches a manual if it is in that list.
>
>
> Then there is the slightly modified `info-apropos` command which by default
> searches in the manuals as listed in the `Info-apropos-default-manuals`
> variable. (Again, for which the default value is a list of all manuals
> under the
> topic 'Emacs' the Info dir file)
> With when ARG is non-nil it will search all manuals on the system.
> When passes a MANUALS-LIST (which should be list), then it will search
> only the
> manuals in that list.
>
>
> Finally, there is an additional command `Info-apropos-select` with which
> you
> can either select a single manual for search or with a prefix argument,
> select a
> single topic for search.
>
> Of course this last selection function could be made more elaborate, but I
> think that
> that is probably overkill and adds unnecessary complexity.
>
> I would be happy to hear any form of feedback or advice.
> Thanks!
>
>
> On Mon, 24 May 2021 at 10:51, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> On May 24, 2021 11:37:11 AM GMT+03:00, dalanicolai <dalanicolai@gmail.com>
>> wrote:
>> > So it turns out that Drew Adams wrote something very useful already...
>> > probably I will propose some additions to his package here
>>
>> His package is not part of Emacs, so if you want to improve the command
>> that is part of Emacs, this isn't the way.
>>
>