Re: Prefix Argument and optional argument

[carlmarcos]

Jul 6, 2022, 11:25 by michael_heerdegen@web.de:

> carlmarcos--- via Users list for the GNU Emacs text editor
> <help-gnu-emacs@gnu.org> writes:
>
>> > You should compile your code; Emacs will say:
>> >
>> >  Warning: misplaced interactive spec: ‘(interactive P)’
>> >
>>
>> I did call `M-x byte-compile-file file' but did not get the warning
>> you desrcibe.
>>
>
> This has been added to master only recently.
>
> Michael.
>
Why is it that using &optional for prefix in good, but without &optional part 
is bad?
Should every time one uses the prefix argument, one has to use an optional 
prefix 
argument?