bug#58808: map-y-or-n-p should use read-key, not read-event

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 26 Oct 2022 23:59:46 +0000
> From: meedstrom--- via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> I found that map-y-or-n-p uses read-event, not read-key (still the case in master as of 2022-10-27).  Will you
> accept a patch if I try to rewrite it?
> 
> Background: I like to translate <escape> to C-g, so I can hit the physical Esc key.  It almost always works,
> except in two cases; when Emacs freezes, and when something calls map-y-or-n-p, like the command M-x
> save-some-buffers.
> 
> An additional concern is that while map-y-or-n-p is doing its thing, even the triplet ESC ESC ESC does not
> work!
> 
> Steps to reproduce:
> 
> 1. Start Emacs -Q
> 2. Eval (define-key function-key-map (kbd "<escape>") (kbd "C-g"))
> 3. Edit some new file
> 4. Type C-x s to trigger save-some-buffers
> 5. Attempt to cancel by hitting the Escape key

Isn't there some translation map that could help you?

Adding Stefan to CC, in case he has comments.

(I'd assume that map-y-or-n-p would work like y-or-n-p, including
support for y-or-n-p-use-read-key, but evidently it doesn't, which is
surprising, I think.)