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|
(* TEST
* expect
*)
(* with module *)
module type S = sig type t and s = t end;;
module type S' = S with type t := int;;
[%%expect{|
module type S = sig type t and s = t end
module type S' = sig type s = int end
|}];;
module type S = sig module rec M : sig end and N : sig end end;;
module type S' = S with module M := String;;
[%%expect{|
module type S = sig module rec M : sig end and N : sig end end
module type S' = sig module rec N : sig end end
|}];;
(* with module type *)
(*
module type S = sig module type T module F(X:T) : T end;;
module type T0 = sig type t end;;
module type S1 = S with module type T = T0;;
module type S2 = S with module type T := T0;;
module type S3 = S with module type T := sig type t = int end;;
module H = struct
include (Hashtbl : module type of Hashtbl with
type statistics := Hashtbl.statistics
and module type S := Hashtbl.S
and module Make := Hashtbl.Make
and module MakeSeeded := Hashtbl.MakeSeeded
and module type SeededS := Hashtbl.SeededS
and module type HashedType := Hashtbl.HashedType
and module type SeededHashedType := Hashtbl.SeededHashedType)
end;;
*)
(* A subtle problem appearing with -principal *)
type -'a t
class type c = object method m : [ `A ] t end;;
module M : sig val v : (#c as 'a) -> 'a end =
struct let v x = ignore (x :> c); x end;;
[%%expect{|
type -'a t
class type c = object method m : [ `A ] t end
module M : sig val v : (#c as 'a) -> 'a end
|}];;
(* PR#4838 *)
let id = let module M = struct end in fun x -> x;;
[%%expect{|
val id : 'a -> 'a = <fun>
|}];;
(* PR#4511 *)
let ko = let module M = struct end in fun _ -> ();;
[%%expect{|
val ko : 'a -> unit = <fun>
|}];;
(* PR#5993 *)
module M : sig type -'a t = private int end =
struct type +'a t = private int end
;;
[%%expect{|
Line 2, characters 2-37:
2 | struct type +'a t = private int end
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: Signature mismatch:
Modules do not match:
sig type +'a t = private int end
is not included in
sig type -'a t = private int end
Type declarations do not match:
type +'a t = private int
is not included in
type -'a t = private int
Their variances do not agree.
|}];;
(* PR#6005 *)
module type A = sig type t = X of int end;;
type u = X of bool;;
module type B = A with type t = u;; (* fail *)
[%%expect{|
module type A = sig type t = X of int end
type u = X of bool
Line 3, characters 23-33:
3 | module type B = A with type t = u;; (* fail *)
^^^^^^^^^^
Error: This variant or record definition does not match that of type u
Constructors do not match:
X of bool
is not the same as:
X of int
The type bool is not equal to the type int
|}];;
(* PR#5815 *)
(* ---> duplicated exception name is now an error *)
module type S = sig exception Foo of int exception Foo of bool end;;
[%%expect{|
Line 1, characters 42-63:
1 | module type S = sig exception Foo of int exception Foo of bool end;;
^^^^^^^^^^^^^^^^^^^^^
Error: Multiple definition of the extension constructor name Foo.
Names must be unique in a given structure or signature.
|}];;
(* PR#6410 *)
module F(X : sig end) = struct let x = 3 end;;
F.x;; (* fail *)
[%%expect{|
module F : functor (X : sig end) -> sig val x : int end
Line 2, characters 0-3:
2 | F.x;; (* fail *)
^^^
Error: The module F is a functor, it cannot have any components
|}];;
type t = ..;;
[%%expect{|
type t = ..
|}];;
module M : sig type t += E end = struct type t += E of int end;;
[%%expect{|
Line 1, characters 33-62:
1 | module M : sig type t += E end = struct type t += E of int end;;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: Signature mismatch:
Modules do not match:
sig type t += E of int end
is not included in
sig type t += E end
Extension declarations do not match:
type t += E of int
is not included in
type t += E
Constructors do not match:
E of int
is not the same as:
E
They have different arities.
|}];;
module M : sig type t += E of char end = struct type t += E of int end;;
[%%expect{|
Line 1, characters 41-70:
1 | module M : sig type t += E of char end = struct type t += E of int end;;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: Signature mismatch:
Modules do not match:
sig type t += E of int end
is not included in
sig type t += E of char end
Extension declarations do not match:
type t += E of int
is not included in
type t += E of char
Constructors do not match:
E of int
is not the same as:
E of char
The type int is not equal to the type char
|}];;
module M : sig type t += C of int end = struct type t += E of int end;;
[%%expect{|
Line 1, characters 40-69:
1 | module M : sig type t += C of int end = struct type t += E of int end;;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: Signature mismatch:
Modules do not match:
sig type t += E of int end
is not included in
sig type t += C of int end
The extension constructor `C' is required but not provided
|}];;
module M : sig
type t += E of { x : int }
end = struct
type t += E of int
end;;
[%%expect{|
Lines 3-5, characters 6-3:
3 | ......struct
4 | type t += E of int
5 | end..
Error: Signature mismatch:
Modules do not match:
sig type t += E of int end
is not included in
sig type t += E of { x : int; } end
Extension declarations do not match:
type t += E of int
is not included in
type t += E of { x : int; }
Constructors do not match:
E of int
is not the same as:
E of { x : int; }
The second uses inline records and the first doesn't.
|}];;
|
