screwlisp (npub1fp0…54p5) So reading your posts, I hit
(#M+ foo bar)
and like what. Eventually find that in the series docs.
But that's the problem, having to guess which docs to read to even know what a weird new bit of "Common" Lisp syntax is.
Contrast with the simpler & no-magic SRFI-41 lazy "streams":
https://srfi.schemers.org/srfi-41/srfi-41.html
But I tend to go even simpler, & just make a generator as let-over-lambda with a next-item function. What it does inside isn't any of the caller's business.