S2.Applicative_infix
val (<*>) : ('a -> 'b, 'e) t -> ('a, 'e) t -> ('b, 'e) t
val (<*) : ('a, 'e) t -> (unit, 'e) t -> ('a, 'e) t
val (*>) : (unit, 'e) t -> ('a, 'e) t -> ('a, 'e) t
val (>>|) : ('a, 'e) t -> ('a -> 'b) -> ('b, 'e) t