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Import Upstream version 20180207
[hcoop/debian/mlton.git]
/
regression
/
callcc3.sml
1
open
MLton
open
Cont
2
3
val
kr
:
unit Cont
.
t option ref
=
ref NONE
4
5
val
rr
:
unit ref option ref
=
ref NONE
6
7
val
r
:
unit ref
=
ref
(
callcc
(
fn
k
=>
kr
:=
SOME k
))
8
9
val
_
=
10
case
!
rr
of
11
NONE
=>
12
(
rr
:=
SOME r
13
;
throw
(
valOf
(!
kr
), ()))
14
| SOME r
' =>
if
r
=
r
'
15
then raise
Fail
"bug"
16
else
()