preface

An opinionated library for function programming (à La Haskell)
IN THIS PACKAGE
type 'a t = 'a t

The type held by the Invariant.

val invmap : ( 'a -> 'b ) -> ( 'b -> 'a ) -> 'a t -> 'b t

Transform an 'a t into an 'b t given a transformation from 'a to 'b and one from 'b to 'a.