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|
(* TEST
flags = "-nopervasives"; (* can't pass -nostdlib because of objects. *)
expect;
*)
(* Signatures *)
(* Tests that everything can be shadowed. *)
module type S = sig
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
;;
[%%expect{|
module type S =
sig
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module type SS = sig
include S
include S
end
;;
[%%expect{|
module type SS =
sig
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
(* Test that the call to nondep works properly. *)
module type Type = sig
include S
type u = t
include S
end
;;
[%%expect{|
module type Type =
sig
type u
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module type Type_fail = sig
include S
val ignore : t -> unit
include S
end
;;
[%%expect{|
Line 4, characters 2-11:
4 | include S
^^^^^^^^^
Error: Illegal shadowing of included type "t/2" by "t".
Line 2, characters 2-11:
2 | include S
^^^^^^^^^
Type "t/2" came from this include.
Line 3, characters 2-24:
3 | val ignore : t -> unit
^^^^^^^^^^^^^^^^^^^^^^
The value "ignore" has no valid type if "t/2" is shadowed.
|}]
module type Module = sig
include S
module N = M
include S
end
;;
[%%expect{|
module type Module =
sig
module N : sig type t end
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module type Module_fail = sig
include S
val ignore : M.t -> unit
include S
end
;;
[%%expect{|
Line 4, characters 2-11:
4 | include S
^^^^^^^^^
Error: Illegal shadowing of included module "M/2" by "M".
Line 2, characters 2-11:
2 | include S
^^^^^^^^^
Module "M/2" came from this include.
Line 3, characters 2-26:
3 | val ignore : M.t -> unit
^^^^^^^^^^^^^^^^^^^^^^^^
The value "ignore" has no valid type if "M/2" is shadowed.
|}]
module type Module_type = sig
include S
module type U = T
include S
end
;;
[%%expect{|
module type Module_type =
sig
module type U
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module type Module_type_fail = sig
include S
module F : functor (_ : T) -> sig end
include S
end
;;
[%%expect{|
Line 4, characters 2-11:
4 | include S
^^^^^^^^^
Error: Illegal shadowing of included module type "T/2" by "T".
Line 2, characters 2-11:
2 | include S
^^^^^^^^^
Module type "T/2" came from this include.
Line 3, characters 2-39:
3 | module F : functor (_ : T) -> sig end
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The module "F" has no valid type if "T/2" is shadowed.
|}]
module type Extension = sig
include S
type ext += C2
include S
end
;;
[%%expect{|
Line 4, characters 2-11:
4 | include S
^^^^^^^^^
Error: Illegal shadowing of included type "ext/2" by "ext".
Line 2, characters 2-11:
2 | include S
^^^^^^^^^
Type "ext/2" came from this include.
Line 3, characters 14-16:
3 | type ext += C2
^^
The extension constructor "C2" has no valid type if "ext/2" is shadowed.
|}]
module type Class = sig
include S
class parametrized : int -> c
include S
end
;;
[%%expect{|
module type Class =
sig
class parametrized : int -> object end
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module type Class_type = sig
include S
class type parametrized = ct
include S
end
;;
[%%expect{|
module type Class_type =
sig
class type parametrized = object end
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig type t end
module type T
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
(* Structures *)
(* Tests that everything can be shadowed. *)
module N = struct
type t
let unit = ()
external e : unit -> unit = "%identity"
module M = struct end
module type T = sig end
exception E
type ext = ..
type ext += C
class c = object end
class type ct = object end
end
;;
[%%expect{|
module N :
sig
type t
val unit : unit
external e : unit -> unit = "%identity"
module M : sig end
module type T = sig end
exception E
type ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module NN = struct
include N
include N
end
;;
[%%expect{|
module NN :
sig
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
(* Test that the call to nondep works properly *)
module Type = struct
include N
type u = t
include N
end
;;
[%%expect{|
module Type :
sig
type u = N.t
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module Module = struct
include N
module O = M
include N
end
;;
[%%expect{|
module Module :
sig
module O = N.M
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module Module_type = struct
include N
module type U = T
include N
end
;;
[%%expect{|
module Module_type :
sig
module type U = N.T
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module Exception = struct
include N
exception Exn = E
include N
end
;;
[%%expect{|
module Exception :
sig
exception Exn
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module Extension = struct
include N
type ext += C2
include N
end
;;
[%%expect{|
module Extension :
sig
type N.ext += C2
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module Class = struct
include N
class parametrized _ = c
include N
end
;;
[%%expect{|
module Class :
sig
class parametrized : 'a -> object end
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
module Class_type = struct
include N
class type parametrized = ct
include N
end
;;
[%%expect{|
module Class_type :
sig
class type parametrized = object end
type t = N.t
val unit : unit
external e : unit -> unit = "%identity"
module M = N.M
module type T = N.T
exception E
type ext = N.ext = ..
type ext += C
class c : object end
class type ct = object end
end
|}]
(** Test rare interaction between shadowing and generalized open in error messages *)
module M = struct
include struct
type t = A
let x = A
end
open struct type t end
open struct type t end
type t
end
[%%expect {|
Line 8, characters 2-8:
8 | type t
^^^^^^
Error: Illegal shadowing of included type "t/4" by "t".
Lines 2-5, characters 2-5:
2 | ..include struct
3 | type t = A
4 | let x = A
5 | end
Type "t/4" came from this include.
Line 4, characters 8-9:
4 | let x = A
^
The value "x" has no valid type if "t/4" is shadowed.
|}]
|
