Re: About `char' in momentary-string-display

[Kevin Rodgers]

On 10/17/13 7:06 AM, Xue Fuqiao wrote:
> Hi,
>
> In (info "(elisp) Temporary Displays"):
>
>   -- Function: momentary-string-display string position&optional char
>            message
> [...]
>       Thus, typing CHAR will simply remove the string from the display,
>       while typing (say) `C-f' will remove the string from the display
>       and later (presumably) move point forward.  The argument CHAR is a
>       space by default.
>
> I tried evaluating ‘(momentary-string-display "foo" 1)’ in the *scratch*
> buffer and typed ‘C-f’, but the point didn't move forward.  Instead, a
> ‘[6]’ is echoed in the *Messages* buffer.  I don't know what the ‘[6]’
> stands for, but the codepoint for ^F is #x6 (ACK).  So I think there may
> be a link between them.
>
> But anyway, why didn't the point move forward (the point wasn't at eob)?
> Can anyone point me in the right direction?


CHAR defaults to SPC, but you typed C-f.  What happens if you type SPC?

What happens if you specify C-f as CHAR:
(momentary-string-display "foo" 1 ?\C-f)

--
Kevin Rodgers
Denver, Colorado, USA