Re: Does code exist to check if a key sequence is valid for Emacs running in terminal mode?

[Robert Pluim]

>>>>> On Fri, 12 Jul 2024 10:35:49 -0400, Pierre Rouleau 
>>>>> <prouleau001@gmail.com> said:

    Pierre> It would therefore like to distinguish the 3 potential cases:
    Pierre> - the key sequence is bound
    Pierre> - the key sequence is not defined.
    Pierre>    Like "C-| is undefined" when tried in Emacs running in graphical 
mode.
    Pierre> - the key sequence is not defined, but reported via an error.
    Pierre>     Like "C-;" when tried under Emacs running in terminal mode
    Pierre>     inside a terminal that does not remap the C-; to some other 
escape
    Pierre> sequence.

In every terminal Iʼm aware of the way it works is that pressing Ctrl
and ; at the same time sends ';', so thereʼs no error case to detect
(maybe this is different with kitty with its extensions)

Plus `describe-key' happily works with key sequences that the current
terminal cannot produce:

(describe-key (kbd "A-C-H-M-s-S-;")) =>

#("A-C-H-M-S-s-; is undefined" 0 13 (face help-key-binding font-lock-face 
help-key-binding))

Robert
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