Parameter Make_using_map2.X

type 'a t
val return : here:lexing_position -> 'a -> 'a t
val map2 : here:lexing_position -> 'a t -> 'b t -> f:('a -> 'b -> 'c) -> 'c t
val map : [ `Define_using_map2 | `Custom of here:lexing_position -> 'a t -> f:('a -> 'b) -> 'b t ]