Re: How to know if a key is pressed without getting it?

[Stefan Monnier]

> I defined the following function using input-pending-p:

> (defun test-input ()
>   (read-char "char: ")
>   (while (input-pending-p)
>     (insert (format "{%S}" unread-command-events)))
>   (message "{%S} END" last-input-char))

> Execute the function above via: M-: (test-input) RET

> Then hold space key.

> The only message returned is "{32} END" followed by all spaces that
> I pressed (except the first one).

This probably depends on how quickly the read-char returns and the
input-pending-p gets run, but it seems reasonable to expect it to be run
in (much) less time than your repeat rate, so when the input-pending-p
is run, there is indeed no input pending yet.


        Stefan