Re: Prefix Argument and optional argument

[Emanuel Berg]

Michael Heerdegen wrote:

>> Why using &optional is ok, but not ok without it?
>
> Non-interactive calls don't come with a prefix arg. When you
> call your function from Lisp, it's often not useful to
> provide something for that argument so it makes no sense to
> make it mandatory. You can make it mandatory if the argument
> also has a meaning for calls from ELisp.

Mess as little as possible with all the interactive stuff
from Lisp.

Uhm, what is all the interactive stuff exactly now again?

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