Re: lax matching is not a great default behavior

[Eli Zaretskii]

> From: Yuri Khan <address@hidden>
> Date: Tue, 1 Dec 2015 16:42:01 +0600
> Cc: John Wiegley <address@hidden>,
>       Andreas Röhler <address@hidden>,
>       Drew Adams <address@hidden>, Emacs developers <address@hidden>
> 
> > Case folding has nothing to do with ASCII.  Latin, Cyrillic, Greek,
> > Hebrew, Arabic, a lot of scripts have the concept of letter case, or
> > different forms for the same letter.
> 
> Also, Japanese has no notion of case, but hiragana vs katakana
> distinction is very similar to lower vs upper case.

While all of the above is true, case-folding in Emacs only folds
characters where the UCD defines case pairs.  AFAIK, this includes
neither Hebrew and Arabic, nor Katakana and Hiragana.  See
characters.el for the full story.