bug#53126: 29.0.50; [PATCH] Lazy highlight/count when reading query-replace string, etc.

[Augusto Stoffel]

I've attached a sketch of a macro to help activating the minibuffer lazy
highlight.  It doesn't make query-replace-read-args exactly short, but
if you like this, I can prepare the patch.

Note that I haven't tested this code at all.  It's for impressionistic
purposes only.

0001-Display-lazy-highlight-and-match-count-in-query-repl.patch
Description: Text Data

Below a response to your last message.

On Sat,  2 Apr 2022 at 21:23, Juri Linkov <juri@linkov.net> wrote:

>> - The value of case-fold-search can change on the fly
>
> Please clarify when it can be changed on the fly.

I refer to the following lines of my patch, which are necessary.

    (when (and case-fold-search search-upper-case)
     (setq isearch-case-fold-search
           (isearch-no-upper-case-p from-string regexp-flag)))

(Incidentally, I like better the ripgrep smart case, where an uppercase
character only matches itself, and lowercase characters match both upper
and lower case.)

>> I'm referring to the anzu feature whereby the replacement text is shown
>> next to each match, like this:
>>
>> This will not be totally trivial to implement, right?  And it will add
>> some extra stuff to query-replace-read-args that is very much
>> query-replace specific.
>
> I very much doubt in usefulness of such a feature.  I thought it could
> simply highlight the replacement text to show the places in the buffer
> that already contain such replacement text.

The anzu thing is only really meaningful if you are doing some complex
replacements with \, and whatnot.  But in that case, I guess it could
help a lot?