Mercurial > urweb
annotate tests/cancel.ur @ 1639:6c00d8af6239
Add a new scoping check for unification variables, to fix a type inference bug
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Sun, 18 Dec 2011 11:29:13 -0500 |
| parents | dfb38a333816 |
| children |
| rev | line source |
|---|---|
| adam@1582 | 1 type t = {A : int, B : float, C : string} |
| adam@1582 | 2 type u = {A : int, C : string, D : bool} |
| adam@1582 | 3 |
| adam@1582 | 4 fun f (x : t) = x |
| adam@1582 | 5 fun g (x : u) = f x |
| adam@1582 | 6 |
| adam@1582 | 7 fun h [ts] [ts ~ [A]] (r : $([A = int] ++ ts)) : $([A = int, B = float] ++ ts) = r |