bug#6227: Color isearch regexp submatches differently

[Juri Linkov]

>> I think `reb-update-overlays' should be completely rewritten
>> for isearch.el.
>
> You surely know this things much better than me, but is there any
> reason to double the code?

`reb-update-overlays' highlights all matches in the buffer.
This is like what lazy-highlighting does.  But we agreed
that it should affect only the current isearch match,
not all lazy-highlighted matches.

> If it is rewritten why not let re-builder share the same code?

Yes, and query-replace highlighting could share it too.

>> The only thing we need from re-builder.el are faces
>> reb-match-1, reb-match-2, reb-match-3.  We should try
>> using the existing faces for the same functionality.

-- 
Juri Linkov
http://www.jurta.org/emacs/