How to disable the / character prefix in Cyrillic input mode?

Question

When I switch to Cyrillic input method (by pressing C-\), the / key starts to act as a prefix to enter extended characters.

For example:

• /o -> њ
• /a -> ќ
• /y -> ї

etc...

Is there a way to disable this behavior? I'd prefer to switch it off permanently for all modes, so pressing the / always enters the same character independently of what I typed after it.

Answer 1

I assume you mean the cyrillic-translit input method.

The supported way is to identify each binding with a slash as prefix by looking at quail/cyrillic.el and unbind it individually:

(quail-defrule "/d" nil "cyrillic-translit")
[...]
(quail-defrule "/t" nil "cyrillic-translit")

The unsupported way is to look at quail's code to perform introspection on the input method, find where the slash is defined in its keymap and unset it:

(quail-select-package "cyrillic-translit")
(dolist (binding (cdr (quail-map)))
  (when (= (car binding) ?/)
    (setcdr binding nil)))

To defer evaluation of that code inside your init file:

(with-eval-after-load "leim/quail/cyrillic"
  (quail-select-package "cyrillic-translit")
  (dolist (binding (cdr (quail-map)))
    (when (= (car binding) ?/)
      (setcdr binding nil))))

One last issue with this is that there doesn't seem to be any supported way of temporarily working with a quail package. Whether that is a problem in practice, you tell me.