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|
(* TEST
expect;
*)
module rec A : sig
type t = int * string
end = struct
type t = A | B
let f (x : t) =
match x with
| A -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type t = A | B
5 |
6 | let f (x : t) =
7 | match x with
8 | | A -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type t = A.t = A | B val f : t -> unit end
is not included in
sig type t = int * string end
Type declarations do not match:
type t = A.t = A | B
is not included in
type t = int * string
The type A.t is not equal to the type int * string
|}]
module rec B : sig
type 'a t = 'a
end = struct
type 'a t = A of 'a | B
let f (x : _ t) =
match x with
| A _ -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type 'a t = A of 'a | B
5 |
6 | let f (x : _ t) =
7 | match x with
8 | | A _ -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type 'a t = 'a B.t = A of 'a | B val f : 'a t -> unit end
is not included in
sig type 'a t = 'a end
Type declarations do not match:
type 'a t = 'a B.t = A of 'a | B
is not included in
type 'a t = 'a
The type 'a B.t is not equal to the type 'a
|}];;
module rec C : sig
type 'a t = { x : 'a }
end = struct
type 'a t = A of 'a | B
let f (x : _ t) =
match x with
| A _ -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type 'a t = A of 'a | B
5 |
6 | let f (x : _ t) =
7 | match x with
8 | | A _ -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type 'a t = 'a C.t = A of 'a | B val f : 'a t -> unit end
is not included in
sig type 'a t = { x : 'a; } end
Type declarations do not match:
type 'a t = 'a C.t = A of 'a | B
is not included in
type 'a t = { x : 'a; }
The first is a variant, but the second is a record.
|}];;
module rec D : sig
type 'a t = int
end = struct
type 'a t = A of 'a | B
let f (x : _ t) =
match x with
| A _ -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type 'a t = A of 'a | B
5 |
6 | let f (x : _ t) =
7 | match x with
8 | | A _ -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type 'a t = 'a D.t = A of 'a | B val f : 'a t -> unit end
is not included in
sig type 'a t = int end
Type declarations do not match:
type 'a t = 'a D.t = A of 'a | B
is not included in
type 'a t = int
The type 'a D.t is not equal to the type int
|}];;
module rec E : sig
type 'a t = [> `Foo ] as 'a
end = struct
type 'a t = A of 'a | B
let f (x : _ t) =
match x with
| A _ -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type 'a t = A of 'a | B
5 |
6 | let f (x : _ t) =
7 | match x with
8 | | A _ -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type 'a t = 'a E.t = A of 'a | B val f : 'a t -> unit end
is not included in
sig type 'a t = 'a constraint 'a = [> `Foo ] end
Type declarations do not match:
type 'a t = 'a E.t = A of 'a | B
is not included in
type 'a t = 'a constraint 'a = [> `Foo ]
The type 'a is not equal to the type [> `Foo ]
|}];;
module rec E2 : sig
type 'a t = [ `Foo ]
end = struct
type 'a t = A of 'a | B
let f (x : _ t) =
match x with
| A _ -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type 'a t = A of 'a | B
5 |
6 | let f (x : _ t) =
7 | match x with
8 | | A _ -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type 'a t = 'a E2.t = A of 'a | B val f : 'a t -> unit end
is not included in
sig type 'a t = [ `Foo ] end
Type declarations do not match:
type 'a t = 'a E2.t = A of 'a | B
is not included in
type 'a t = [ `Foo ]
The type 'a E2.t is not equal to the type [ `Foo ]
|}];;
module rec E3 : sig
type 'a t = [< `Foo ] as 'a
end = struct
type 'a t = A of 'a | B
let f (x : _ t) =
match x with
| A _ -> ()
| B -> ()
end;;
[%%expect{|
Lines 3-10, characters 6-3:
3 | ......struct
4 | type 'a t = A of 'a | B
5 |
6 | let f (x : _ t) =
7 | match x with
8 | | A _ -> ()
9 | | B -> ()
10 | end..
Error: Signature mismatch:
Modules do not match:
sig type 'a t = 'a E3.t = A of 'a | B val f : 'a t -> unit end
is not included in
sig type 'a t = 'a constraint 'a = [< `Foo ] end
Type declarations do not match:
type 'a t = 'a E3.t = A of 'a | B
is not included in
type 'a t = 'a constraint 'a = [< `Foo ]
The type 'a is not equal to the type [< `Foo ]
|}];;
module rec F : sig
type ('a, 'b) t = Foo of 'a
end = struct
type ('a, 'b) t = Foo of 'b
(* this function typechecks properly, which means that we've added the
manisfest. *)
let coerce : 'a 'b. ('a, 'b) t -> ('a, 'b) F.t = fun x -> x
end;;
[%%expect{|
Lines 3-9, characters 6-3:
3 | ......struct
4 | type ('a, 'b) t = Foo of 'b
5 |
6 | (* this function typechecks properly, which means that we've added the
7 | manisfest. *)
8 | let coerce : 'a 'b. ('a, 'b) t -> ('a, 'b) F.t = fun x -> x
9 | end..
Error: Signature mismatch:
Modules do not match:
sig
type ('a, 'b) t = ('a, 'b) F.t = Foo of 'b
val coerce : ('a, 'b) t -> ('a, 'b) F.t
end
is not included in
sig type ('a, 'b) t = Foo of 'a end
Type declarations do not match:
type ('a, 'b) t = ('a, 'b) F.t = Foo of 'b
is not included in
type ('a, 'b) t = Foo of 'a
Constructors do not match:
Foo of 'b
is not the same as:
Foo of 'a
The type 'b is not equal to the type 'a
|}];;
|
