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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| (* TEST | ||
| flags = "-extension layouts_alpha"; | ||
| runtime5; | ||
| *) | ||
|
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||
| let x = Null | ||
|
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| let () = | ||
| match x with | ||
| | Null -> () | ||
| | This _ -> assert false | ||
| ;; | ||
|
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| let y = This 3 | ||
|
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||
| let () = | ||
| match y with | ||
| | This 3 -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
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||
|
|
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| external int_as_pointer : int -> int or_null = "%int_as_pointer" | ||
|
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| let n = int_as_pointer 0 | ||
|
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| let () = | ||
| match n with | ||
| | Null -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
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| external int_as_int : int -> int or_null = "%identity" | ||
|
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| let m = int_as_int 5 | ||
|
|
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| let () = | ||
| match m with | ||
| | This 5 -> () | ||
| | This _ -> assert false | ||
| | Null -> assert false | ||
| ;; | ||
|
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||
| let x = (Null, This "bar") | ||
|
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| let () = | ||
| match x with | ||
| | Null, This "foo" -> assert false | ||
| | Null, This "bar" -> () | ||
| | _, This "bar" -> assert false | ||
| | Null, _ -> assert false | ||
| | _, _ -> assert false | ||
| ;; | ||
|
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| let y a = fun () -> This a | ||
|
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| let d = y 5 | ||
|
|
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| let () = | ||
| match d () with | ||
| | This 5 -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
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| external to_bytes : ('a : value_or_null) . 'a -> int list -> bytes = "caml_output_value_to_bytes" | ||
|
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| external from_bytes_unsafe : ('a : value_or_null) . bytes -> int -> 'a = "caml_input_value_from_bytes" | ||
|
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| let z = to_bytes (This "foo") [] | ||
|
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| let () = | ||
| match from_bytes_unsafe z 0 with | ||
| | This "foo" -> () | ||
| | This _ -> assert false | ||
| | Null -> assert false | ||
| ;; | ||
|
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| let w = to_bytes Null [] | ||
|
|
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| let () = | ||
| match from_bytes_unsafe w 0 with | ||
| | Null -> () | ||
| | This _ -> assert false | ||
| ;; | ||
|
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| external evil : 'a or_null -> 'a = "%identity" | ||
|
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| let e = This (evil Null) | ||
|
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| let () = | ||
| match e with | ||
| | Null -> () | ||
| | This _ -> assert false | ||
| ;; | ||
|
|
||
| let e' = evil (This 4) | ||
|
|
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| let () = | ||
| match e' with | ||
| | 4 -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
|
||
| let f a = fun () -> | ||
| match a with | ||
| | This x -> x ^ "bar" | ||
| | Null -> "foo" | ||
| ;; | ||
|
|
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| let g = f (This "xxx") | ||
|
|
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| let () = | ||
| match g () with | ||
| | "xxxbar" -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
|
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| let h = f Null | ||
|
|
||
| let () = | ||
| match h () with | ||
| | "foo" -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
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| type 'a nref = { mutable v : 'a or_null } | ||
|
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| let x : string nref = { v = Null } | ||
|
|
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| let () = | ||
| match x.v with | ||
| | Null -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
|
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| let () = x.v <- This "foo" | ||
|
|
||
| let () = | ||
| match x.v with | ||
| | This "foo" -> () | ||
| | _ -> assert false | ||
| ;; | ||
|
|
||
| let () = x.v <- Null | ||
|
|
||
| let () = | ||
| match x.v with | ||
| | Null -> () | ||
| | _ -> assert false | ||
| ;; |
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