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zz_old
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Location and Directory
[hcoop/zz_old/domtool2-proto.git]
/
src
/
tycheck.sml
diff --git
a/src/tycheck.sml
b/src/tycheck.sml
index
6d58e43
..
152eaf7
100644
(file)
--- a/
src/tycheck.sml
+++ b/
src/tycheck.sml
@@
-170,6
+170,8
@@
fun predImplies (p1All as (p1, _), p2All as (p2, _)) =
| (_, CPrefix p2) => predImplies (p1All, p2)
| (CNot p1, CNot p2) => predImplies (p2, p1)
+ | (CRoot, CNot (CConst _, _)) => true
+ | (CConst s1, CNot (CConst s2, _)) => s1 <> s2
| _ => false