Nu

advanced

The Nu datatype is the simplest way to model corecursion via a direct encoding of the ana function.

@higherkind
class Nu<out F>(val a: Any?, val unNu: Coalgebra<F, Any?>) : NuOf<F>

Nu’s constructor is isomorphic to ana.

Comparison to Fix and Nu

Nu warns that a datatype can be be infinite, and should be used for any algorithms that can work on infinite data (for example map). Due to it being a direct encoding of ana, Nu also has a very fast Corecursive instance.

Supported Type Classes

Module Type classes
arrow.recursion.typeclasses Birecursive, Corecursive, Recursive