aboutsummaryrefslogtreecommitdiffhomepage
path: root/test-suite/bugs/7333.v
blob: fba5b9029dfa91ecd0f560440d797b6e5b5b02b3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
Module Example1.

CoInductive wrap : Type :=
 | item : unit -> wrap.

Definition extract (t : wrap) : unit :=
match t with
| item x => x
end.

CoFixpoint close u : unit -> wrap :=
match u with
| tt => item
end.

Definition table : wrap := close tt tt.

Eval vm_compute in (extract table).
Eval vm_compute in (extract table).

End Example1.

Module Example2.

Set Primitive Projections.
CoInductive wrap : Type :=
 item { extract : unit }.

CoFixpoint close u : unit -> wrap :=
match u with
| tt => item
end.

Definition table : wrap := close tt tt.

Eval vm_compute in (extract table).
Eval vm_compute in (extract table).

End Example2.