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|
(* TEST
expect;
*)
type t = Set.Make(String).t
[%%expect{|
type t = Set.Make(String).t
|} ]
(* Check the error messages of an ill-typed applicatived functor type. *)
module M = struct type t let equal = (=) end
[%%expect{|
module M : sig type t val equal : 'a -> 'a -> bool end
|} ]
type t = Set.Make(M).t
[%%expect{|
Line 1, characters 9-22:
1 | type t = Set.Make(M).t
^^^^^^^^^^^^^
Error: Modules do not match:
sig type t = M.t val equal : 'a -> 'a -> bool end
is not included in Set.OrderedType
The value `compare' is required but not provided
File "set.mli", line 55, characters 4-31: Expected declaration
|} ]
(* We would report the wrong error here if we didn't strengthen the
type of the argument (type t wouldn't match). *)
module F(X : sig type t = M.t val equal : unit end)
= struct type t end
[%%expect{|
module F :
functor (X : sig type t = M.t val equal : unit end) -> sig type t end
|} ]
type t = F(M).t
[%%expect{|
Line 1, characters 9-15:
1 | type t = F(M).t
^^^^^^
Error: Modules do not match:
sig type t = M.t val equal : 'a -> 'a -> bool end
is not included in sig type t = M.t val equal : unit end
Values do not match:
val equal : 'a -> 'a -> bool
is not included in
val equal : unit
The type 'a -> 'a -> bool is not compatible with the type unit
|} ]
(* MPR#7611 *)
module Generative() = struct type t end
[%%expect{|
module Generative : functor () -> sig type t end
|}]
type t = Generative(M).t
[%%expect{|
Line 1, characters 9-24:
1 | type t = Generative(M).t
^^^^^^^^^^^^^^^
Error: The functor Generative is generative, it cannot be applied in type
expressions
|}]
module F(X : sig module type S module F : S end) = struct
type t = X.F(Parsing).t
end
[%%expect{|
Line 2, characters 11-25:
2 | type t = X.F(Parsing).t
^^^^^^^^^^^^^^
Error: The module X.F is abstract, it cannot be applied
|}]
|
