bug#51449: 28.0.50; iso-transl overwrites alt key bindings

[Mark Bestley]

On Thu, 28 Oct 2021, at 10:41, Eli Zaretskii wrote:
>> Date: Thu, 28 Oct 2021 09:12:54 +0100
>> From: "Mark Bestley" <gnu@bestley.co.uk>
>> Cc: 51449@debbugs.gnu.org
>> 
>> On Thu, 28 Oct 2021, at 08:12, Eli Zaretskii wrote:
>> 
>> >
>> > iso-transl is preloaded now.  But I don't think I understand why it
>> > gets in your way: can't you unbind the bindings that iso-transl does,
>> > if you have no use for them, or rebind them after changing Alt to be a
>> > modifier key if you do have use for iso-transl?
>> >
>> > (Caveat: I don't use a Mac, so I may be missing some Mac-specific
>> > issue here.)
>> 
>> In scratch buffer on emacs - Q
>> 
>> 
>> (setq  mac-command-modifier 'alt)
>> 
>> (global-set-key (kbd "A-c")  'info)
>> (global-set-key (kbd "A-z")  'info)
>> 
>> Then A-z runs info but A-c just inserts ¢
>
> I'm not arguing against facts, I asked why you cannot undo what
> iso-transl does.  For example, disable key-translation-map, or
> redefine its entries as you see fit.


Mainly because I did not know the depths of emacs and what to do with 
key-translation-map and getting annoyed with something happening without me 
asking for it and being totally surprised by the change in bindings especially 
as I thought users had complete control of A- bindings, only C-x were reserved 
for emacs use. (Ie I had not require iso-trans myself)

I have now undone the iso-trans changes as Gregory suggested 

(dolist (transl-char iso-transl-char-map)
      (let ((vec (vconcat (car transl-char))))
        (aset vec 0 (logior (aref vec 0) ?\A-\^@))
        (define-key key-translation-map vec nil)))))



-- 
Mark