base

Full standard library replacement for OCaml
IN THIS PACKAGE
val return : 'a -> ( 'a, _ ) X.t
val map : ( 'a, 'e ) X.t -> f:( 'a -> 'b ) -> ( 'b, 'e ) X.t
val both : ( 'a, 'e ) X.t -> ( 'b, 'e ) X.t -> ( 'a * 'b, 'e ) X.t
module Open_on_rhs : Intf.S