val (<*>) : ('a -> 'b) t -> 'a t -> 'b t
val (<**>) : 'a t -> ('a -> 'b) t -> 'b t
val (*>) : unit t -> 'a t -> 'a t
val (<*) : 'a t -> unit t -> 'a t
val (<$>) : ('a -> 'b) -> 'a t -> 'b t
val (<&>) : 'a t -> ('a -> 'b) -> 'b t
val (<$) : 'a -> 'b t -> 'a t
val ($>) : 'a t -> 'b -> 'b t