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|
(* TEST
expect;
*)
module X = struct
type t =
| A : 'a * 'b * ('a -> unit) -> t
end;;
[%%expect{|
module X : sig type t = A : 'a * 'b * ('a -> unit) -> t end
|}]
module Y = struct
type t = X.t =
| A : 'a * 'b * ('b -> unit) -> t
end;; (* should fail *)
[%%expect{|
Lines 2-3, characters 2-37:
2 | ..type t = X.t =
3 | | A : 'a * 'b * ('b -> unit) -> t
Error: This variant or record definition does not match that of type X.t
Constructors do not match:
A : 'a * 'b * ('a -> unit) -> X.t
is not the same as:
A : 'a * 'b * ('b -> unit) -> X.t
The type 'a -> unit is not equal to the type 'b -> unit
Type 'a is not equal to type 'b
|}]
(* would segfault
let () =
match Y.A (1, "", print_string) with
| X.A (x, y, f) -> f x
*)
|
