bug#13041: 24.2; diacritic-fold-search

[Eli Zaretskii]

> Date: Thu, 06 Dec 2012 11:34:26 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: Drew Adams <drew.adams@oracle.com>, eliz@gnu.org, perin@panix.com, 
>  13041@debbugs.gnu.org, perin@acm.org
> 
>  > Emacs contains ucs-normailze package which provides various
>  > normalization functions.  For instance,
>  >
>  > (require 'ucs-normalize)
>  > (ucs-normalize-NFKD-string "Äffin") => "Äffin"
>  >
>  > Isn't it usable?
> 
> Actually, the function should do what we need.  But I have no idea how
> to integrate it into a searching algorithm.  And when sorting, it seems
> expensive for comparing buffer substrings.  Also, the use of a temporary
> buffer for normalizing every single string makes its weight quite heavy.

Yes, I don't think this will be possible without changes on the C
level.  Those changes should use code very similar to what we
currently do for case-insensitive search.