| 1 | structure Weak = MLton.Weak |
| 2 | |
| 3 | val x = (13, ref 5) |
| 4 | val wx = Weak.new x |
| 5 | fun isAlive () = isSome (Weak.get wx) |
| 6 | val _ = MLton.GC.collect () |
| 7 | val _ = print (Bool.toString (isAlive ()) ^ "\n") |
| 8 | |
| 9 | (* |
| 10 | fun sum (x : int * (int list ref vector * int * int) ref) = |
| 11 | #1 x + |
| 12 | #2 (! (#2 x)) + |
| 13 | #3 (! (#2 x)) + |
| 14 | Vector.foldr (fn (lr,s) => List.foldr (op +) s (!lr)) 0 (#1 (! (#2 x))) |
| 15 | |
| 16 | val x = (13, ref (Vector.tabulate (10, fn n => ref (List.tabulate (n, fn i => i))), |
| 17 | 4, |
| 18 | 5)) |
| 19 | val wx = Weak.new x |
| 20 | fun isAlive () = isSome (Weak.get wx) |
| 21 | val _ = MLton.GC.collect () |
| 22 | val _ = print (Bool.toString (isAlive ()) ^ "\n") |
| 23 | val s1 = sum x |
| 24 | *) |