I don't know about standardish, but there's this: https://hackage.haskell.org/package/streams/docs/Data-Stream-Infinite.html
Is this type defined anywhere in base or elsewhere standardish?
https://gist.github.com/chrisdone/516489f4f27846712225#file-type-hs-L52
data Stream a =
Stream a (Stream a)
Ciao
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