1-Xml.W
type 'a t
val return : 'a -> 'a t
type ('a, 'b) ft = 'a -> 'b
val fmap : ( 'a, 'b ) ft -> 'a t -> 'b t
type 'a tlist
val nil : unit -> 'a tlist
val singleton : 'a t -> 'a tlist
val cons : 'a t -> 'a tlist -> 'a tlist
val append : 'a tlist -> 'a tlist -> 'a tlist
val map : ( 'a, 'b ) ft -> 'a tlist -> 'b tlist