Re: `global-set-key' vs `keymap-global-set' `key-valid-p' syntax

[Emanuel Berg]

> However there is one use case I don't know how to translate
> to the new format, it looks, for example, like this:
>
>   (define-key input-decode-map [?\u1000] [M-S-RET-a])
>   (global-set-key [M-S-RET-a] (lambda () (interactive) (message "hit 
> M-S-RET")))

Here is another example of the same thing, almost.

;;; -*- lexical-binding: t -*-
;;
;; this file:
;;   https://dataswamp.org/~incal/emacs-init/signal.el
;;
;; test from Emacs:
;;   (signal-process (emacs-pid) 'sigusr1)
;;
;; test from zsh:
;;   $ kill -s usr1 $(pidof emacs)

(defun signal-usr1-f ()
  (interactive)
  (message "USR1 signal") )

(define-key special-event-map [sigusr1] #'signal-usr1-f)

(provide 'signal)

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