RosettaCodeData/Task/Fibonacci-sequence/Purity/fibonacci-sequence-3.purity

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2013-04-10 22:43:41 -07:00
import Histo
data Fib3 = Histo . Memoize
<
const One,
(p1 =>
<
const One,
(p2 => Add (outl $p1) (outl $p2)). UnmakeCofree
> (outr $p1)) . UnmakeCofree
>