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|
(* TEST
ocamlopt_flags = "-dcmm-invariants";
native;
*)
module Constant = struct
type ('a, 'b) result =
| Ok of 'a
| Error of 'b
module S = struct
type t =
[
`B0
(* renaming the following variants makes the problem go away *)
| `CA
| `CH
| `CI
| `CL
| `Other of string
]
end
type a1 = [ `CA ]
type a2 = [ `CH ]
type a3 = [ `CL ]
let ok = Ok ()
let error s =
Error s
let foo =
let current =
let module T = struct
type a1 =
[ `Common
| `Uuuu
| `Ssss
| `Rrrr
]
type a2 = [ `Common ]
type a3 =
[ `Common ]
end
in
fun ~s typ ->
match s with
| `None -> error s
| #a1 ->
(match typ with
| #T.a1 -> ok
| _ -> error s)
| #a2 ->
(match typ with
| #T.a2 -> ok
| _ -> error s)
| #a3 ->
(match typ with
| #T.a3 -> ok
| _ -> error s)
| #S.t -> error s
in
current
end
module Constr = struct
type ('a, 'b) result =
| Ok of 'a
| Error of 'b
module S = struct
type t =
[
`B0 of int
(* renaming the following variants makes the problem go away *)
| `CA of int
| `CH of int
| `CI of int
| `CL of int
| `Other
]
end
type a1 = [ `CA of int ]
type a2 = [ `CH of int ]
type a3 = [ `CL of int ]
let ok = Ok ()
let error s =
Error s
let foo =
let current =
let module T = struct
type a1 =
[ `Common
| `Uuuu
| `Ssss
| `Rrrr
]
type a2 = [ `Common ]
type a3 =
[ `Common ]
end
in
fun ~s typ ->
match s with
| `None -> error s
| #a1 ->
(match typ with
| #T.a1 -> ok
| _ -> error s)
| #a2 ->
(match typ with
| #T.a2 -> ok
| _ -> error s)
| #a3 ->
(match typ with
| #T.a3 -> ok
| _ -> error s)
| #S.t -> error s
in
current
end
module Gadts = struct
type keep = private Keep
type drop = private Drop
type _ t =
| C00 : keep t
| C01 : drop t
| C02 : drop t
| C03 : drop t
| C04 : drop t
| C05 : drop t
| C06 : drop t
| C07 : drop t
| C08 : drop t
| C09 : drop t
| C10 : drop t
| C11 : drop t
| C12 : drop t
| C13 : drop t
| C14 : drop t
| C15 : drop t
| C16 : drop t
| C17 : drop t
| C18 : drop t
| C19 : drop t
| C20 : keep t
| C21 : drop t
| C22 : drop t
| C23 : drop t
| C24 : keep t
| C25 : keep t
| C26 : drop t
| C27 : drop t
| C28 : keep t
let not_at_toplevel b =
let f (x: keep t) =
match x with
| C00 -> 0
| C20 ->
begin
(* The implementation of the local function optimisation will not
handle well multiple bindings of the same function, so this
code will reliably fail to compile with Closure if it ends up
duplicated. *)
let[@local] handler x = x + 2 in
if b then handler 0 else handler 1
end
| C24 -> 2
| C25 -> 3
| C28 -> 4
in
f
end
|
