Re: GNU Emacs 22.0.50 fails to find ä in different ISO Latin encodings

[Kenichi Handa <handa@m17n.org>]

In article <F021B5CA-A186-4AFB-B650-520DBB6261C4@Web.DE>, Peter Dyballa <Peter_Dyballa@Web.DE> writes:

> Hello!
> Launched with -Q

> 	unify-8859-on-decoding-mode is nil
> 	unify-8859-on-encoding-mode is t

> I start i-search in an Unicode encoded buffer (*Help*). In an ISO  
> 8859-1 encoded buffer ä and Ä are found, also in ISO 8859-10, ISO  
> 8859-13 (except for Ä), ISO 8859-14, and ISO 8859-16 encoded buffers,  
> but fails in ISO 8859-2, ISO 8859-3, ISO 8859-4, ISO 8859-9, and ISO  
> 8859-15. It is similiar to ö and ü, accept that these are not found  
> in the ISO 8859-14 encoded buffer. Changing unify-8859-on-decoding- 
> mode's value makes no difference.

This is the story I remember.

A while ago, I proposed to change isearch so that it
translates characters by translation-table-for-input to
solve such a problem, but there raised an objection that
read-char should do that translation.  RMS asked to check if
such a change to read-char is surely safe or not, but as
such a check is very difficult and time-consuiming, no one
took on the job.

So, this problem is still unfixed.

I again propose to change isearch.  When we know that
changing read-char is safe in the future, we can cancel that
change in isearch.

---
Kenichi Handa
handa@m17n.org