Types.POLY_TYPE
Polymorphic type (GADT)
type 'a t
val poly_equal : 'a t -> 'b t -> ('a, 'b) poly_equal
val poly_order : 'a t -> 'b t -> ('a, 'b) poly_order
val pp : 'a pp -> 'a t pp
val hash : 'a t -> int