bug#13041: 24.2; diacritic-fold-search

[Eli Zaretskii]

> Date: Wed, 05 Dec 2012 10:41:40 +0100
> From: martin rudalics <rudalics@gmx.at>
> CC: juri@jurta.org, perin@panix.com, 13041@debbugs.gnu.org, 
>  perin@acm.org
> 
>  > How about putting it in subr.el?
> 
> If I correctly understand Juri, I next have to deal with things like
> 
> (get-char-code-property #xff59 'decomposition)
> 
> and related issues we might unearth in the course of this.

My reading of the table in

  http://www.unicode.org/reports/tr44/#Character_Decomposition_Mappings

you should ignore any car of the list returned by
get-char-code-property if it does not pass the characterp test (or
those that do pass the symbolp test).  That is, the character #xff59
should sort exactly like lower-case y.