Am Mo., 14. Sept. 2020 um 11:33 Uhr schrieb Shiro Kawai <xxxxxx@gmail.com>:
>
> Ah, I see.   Yes, I assumed that generator-find stops reading the source as soon as it finds a satisfying item or get eof.
>
> I think we better take the wording from generator-any.
>
>   Applies pred to each item from gen.  As soon as it yields a true value, the item is returned without consuming the rest of gen.
>   If gen is exhausted, returns #f.

That looks good to me.

If it cannot go in this SRFI, maybe it can go in some later revision
under a new SRFI number. For example, generator-every and
generator-any should be able to take more than one generator argument
(as every and any in SRFI 1).