accessor

A library that makes it nicer to work with nested functional data structures
IN THIS PACKAGE
Parameter #1 Accessor . Many . Make_access . T
type ('a, 'b) t
val many : ( 'at -> ( 'bt, 'a, 'b ) Many.t ) -> ( 'a, 'b ) t -> ( 'at, 'bt ) t

A legal implementation of this function must satisfy the following properties:

many Many.Accessed.return = Fn.id
Fn.compose (many f) (many g)
= many (fun at -> Many.Accessed.bind (f at) ~f:g)