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|
(* TEST
* expect
*)
module Constr = struct
type t = A | B | C
let get _ _ = A
let put f = ignore (f () : t)
end
module Record = struct
type t = { a : int; b : int; c : int }
let get _ _ = { a = 0; b = 0; c = 0 }
let put f = ignore (f () : t)
end
module Bool = struct
type t = true | false
let get _ _ = true
let put f = ignore (f () : t)
end
module List = struct
type 'a t = [] | (::) of 'a * 'a t
let get _ _ = []
let put f = ignore (f () : int t)
end
module Unit = struct
[@@@warning "-redefining-unit"]
type t = ()
let get _ _ = ()
let put f = ignore (f (() : unit) : t)
end;;
[%%expect{|
module Constr :
sig
type t = A | B | C
val get : 'a -> 'b -> t
val put : (unit -> t) -> unit
end
module Record :
sig
type t = { a : int; b : int; c : int; }
val get : 'a -> 'b -> t
val put : (unit -> t) -> unit
end
module Bool :
sig
type t = true | false
val get : 'a -> 'b -> t
val put : (unit -> t) -> unit
end
module List :
sig
type 'a t = [] | (::) of 'a * 'a t
val get : 'a -> 'b -> 'c t
val put : (unit -> int t) -> unit
end
module Unit :
sig type t = () val get : 'a -> 'b -> t val put : (unit -> t) -> unit end
|}]
let () =
match Constr.get () with
| A | B | C -> ();;
[%%expect{|
Line 3, characters 4-5:
3 | | A | B | C -> ();;
^
Error: This pattern should not be a constructor, the expected type is
'a -> Constr.t
|}]
let () =
match Record.get () with
| { a; _ } -> ();;
[%%expect{|
Line 3, characters 4-12:
3 | | { a; _ } -> ();;
^^^^^^^^
Error: This pattern should not be a record, the expected type is
'a -> Record.t
|}]
let () =
match Bool.get () with
| true -> ();;
[%%expect{|
Line 3, characters 4-8:
3 | | true -> ();;
^^^^
Error: This pattern should not be a boolean literal, the expected type is
'a -> Bool.t
|}]
let () =
match Bool.get () with
| false -> ();;
[%%expect{|
Line 3, characters 4-9:
3 | | false -> ();;
^^^^^
Error: This pattern should not be a boolean literal, the expected type is
'a -> Bool.t
|}]
let () =
match List.get () with
| [] -> ();;
[%%expect{|
Line 3, characters 4-6:
3 | | [] -> ();;
^^
Error: This pattern should not be a list literal, the expected type is
'a -> 'b List.t
|}]
let () =
match List.get () with
| _ :: _ -> ();;
[%%expect{|
Line 3, characters 4-10:
3 | | _ :: _ -> ();;
^^^^^^
Error: This pattern should not be a list literal, the expected type is
'a -> 'b List.t
|}]
let () =
match Unit.get () with
| () -> ();;
[%%expect{|
Line 3, characters 4-6:
3 | | () -> ();;
^^
Error: This pattern should not be a unit literal, the expected type is
'a -> Unit.t
|}]
let () = Constr.put A;;
[%%expect{|
Line 1, characters 20-21:
1 | let () = Constr.put A;;
^
Error: This expression should not be a constructor, the expected type is
unit -> Constr.t
|}]
let () = Record.put { a = 0; b = 0; c = 0 };;
[%%expect{|
Line 1, characters 20-43:
1 | let () = Record.put { a = 0; b = 0; c = 0 };;
^^^^^^^^^^^^^^^^^^^^^^^
Error: This expression should not be a record, the expected type is
unit -> Record.t
|}]
let () = Bool.put true;;
[%%expect{|
Line 1, characters 18-22:
1 | let () = Bool.put true;;
^^^^
Error: This expression should not be a boolean literal, the expected type is
unit -> Bool.t
|}]
let () = Bool.put false;;
[%%expect{|
Line 1, characters 18-23:
1 | let () = Bool.put false;;
^^^^^
Error: This expression should not be a boolean literal, the expected type is
unit -> Bool.t
|}]
let () = List.put [];;
[%%expect{|
Line 1, characters 18-20:
1 | let () = List.put [];;
^^
Error: This expression should not be a list literal, the expected type is
unit -> int List.t
|}]
let () = List.put (1 :: 2);;
[%%expect{|
Line 1, characters 18-26:
1 | let () = List.put (1 :: 2);;
^^^^^^^^
Error: This expression should not be a list literal, the expected type is
unit -> int List.t
|}]
let () = Unit.put ();;
[%%expect{|
Line 1, characters 18-20:
1 | let () = Unit.put ();;
^^
Error: This expression should not be a unit literal, the expected type is
unit -> Unit.t
|}]
let () =
ignore ((Record.get ()).a);;
[%%expect{|
Line 2, characters 10-25:
2 | ignore ((Record.get ()).a);;
^^^^^^^^^^^^^^^
Error: This expression has type 'a -> Record.t which is not a record type.
|}]
let () =
(Record.get ()).a <- 5;;
[%%expect{|
Line 2, characters 2-17:
2 | (Record.get ()).a <- 5;;
^^^^^^^^^^^^^^^
Error: This expression has type 'a -> Record.t which is not a record type.
|}]
let () =
ignore { (Record.get ()) with a = 5 };;
[%%expect{|
Line 2, characters 11-26:
2 | ignore { (Record.get ()) with a = 5 };;
^^^^^^^^^^^^^^^
Error: This expression has type 'a -> Record.t which is not a record type.
|}]
let foo x =
Record.put { x with a = 5 };;
[%%expect{|
Line 2, characters 13-29:
2 | Record.put { x with a = 5 };;
^^^^^^^^^^^^^^^^
Error: This expression should not be a record, the expected type is
unit -> Record.t
|}]
|
