According to the documentation of SRFI 41, the state is first when
calling f in stream-fold, yes. But we should extend it to more than
one stream, of which one has to be finite.

stream-fold-right is not provided in the API (the reason is given in
SRFI 41), but in one example in SRFI 41. In the example code, it is
called with the state (or should I call it "costate" :)) as the second
argument.

Am Fr., 11. Sept. 2020 um 23:00 Uhr schrieb John Cowan <xxxxxx@ccil.org>:
>
> Can someone do an analysis of stream-fold and stream-fold-right to say whether what the order of arguments in f is?  I am pretty sure the state is called first in stream-fold(-left), but I am uncertain about stream-fold-right.