datum

Implements option/either types, monads, and lenses inspired by Haskell and Scala, detailed in the feature overview for expressive error handling and data manipulation.

Promotes a 'scrap your boilerplate' approach to minimize macro usage, enhancing code maintainability as stated in the README's philosophy.

Provides pure functional data structures like red-black trees and heaps, based on Chris Okasaki's work, enabling efficient immutable operations.

Offers lazy streams for on-demand computed elements, optimizing memory usage for large datasets, as highlighted in the key features.