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Re: Can't isearch 'ö'

From: Peter Dyballa
Subject: Re: Can't isearch 'ö'
Date: Fri, 15 Apr 2005 12:43:10 +0200

Am 10.04.2005 um 16:50 schrieb Stefan Monnier:

In a text buffer starting with

        ;;; -*- mode: Emacs-Lisp; coding: iso-8859-15; -*-

I have a line

            (message "konventionell-römisch")

which I can't find with C-s ö. It's always "Failing I-search: ö."

I think I got the reason for this behaviour:

 '(unify-8859-on-decoding-mode t nil (ucs-tables))

unify-8859-on-decoding-mode is an interactive compiled Lisp function in `international/ucs-tables'.
        (unify-8859-on-decoding-mode &optional ARG)
        Set up translation-tables for unifying ISO 8859 characters on decoding.
        On decoding, i.e. input operations, non-ASCII characters from the
        built-in ISO 8859 charsets are unified by mapping them into the
        `iso-latin-1' and `mule-unicode-0100-24ff' charsets.
Also sets `translation-table-for-input' globally, so that keyboard input
        produces unified characters.
        See also command `unify-8859-on-encoding-mode' and the user option

Seems this customization makes keyboard input become iso-latin-1 and mule-unicode-0100-24ff, which are distinct from iso-latin-9 or iso-latin-2 or ... of the text buffers so that 'ö' and 'ö' aren't the same any more.

Changing the value in *Customization* buffer for the current session does not change the mode isearch works in, only relaunching GNU Emacs changes the behaviour and brings success.


                      ~  o
                      ~  O   O

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