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Add monadic versions of the unfoldr functions #123

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hansroland opened this issue Jul 9, 2023 · 0 comments

hansroland commented Jul 9, 2023

Currently vector-sized implements only pure, non-monadic version of the unfoldrfunctions, eg in the unboxed module:

unfoldrN :: forall n a b. (KnownNat n, Unbox a) => (b -> (a, b)) -> b -> Vector n a
unfoldrN' :: forall n a b p. (KnownNat n, Unbox a) => p n -> (b -> (a, b)) -> b -> Vector n a

The normal vector package has also monadic versions like unfoldrM, unfoldrNM and unfoldrExactNM.

It would be nice to have them also in this library, eg for the unboxed module:

unfoldrNM :: forall m n a b. (KnownNat n, Unbox a, Monad m) => (b -> m (a, b)) -> b -> m (Vector n a)
unfoldrNM' :: forall m n a b p. (KnownNat n, Unbox a, Monad m) => p n -> (b -> m (a, b)) -> b -> m (Vector n a)

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