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diff tests/relops.ur @ 260:645d0e8da643

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Monoize relops
author Adam Chlipala <adamc@hcoop.net>
date Sun, 31 Aug 2008 15:47:32 -0400
parents 71bafe66dbe1
children e933297c4e24
line wrap: on
line diff
--- a/tests/relops.ur	Sun Aug 31 15:36:15 2008 -0400
+++ b/tests/relops.ur	Sun Aug 31 15:47:32 2008 -0400
@@ -7,4 +7,24 @@
         INTERSECT SELECT t1.B, t1.A FROM t1 WHERE t1.B = t1.B)
 val q3 = (SELECT t1.A, t1.B, t1.C FROM t1 WHERE t1.A = 0
         INTERSECT SELECT * FROM t1 WHERE t1.B = 'Hello world!'
-        EXCEPT SELECT * FROM t1 WHERE t1.A < t1.A)
+        EXCEPT SELECT * FROM t1 WHERE t1.A < t1.A
+        UNION SELECT * FROM t1 WHERE t1.A > t1.A)
+
+datatype list a = Nil | Cons of a * list a
+
+val r1 : transaction (list {A : int, B : string, C : float}) =
+        query q3
+        (fn fs acc => return (Cons (fs.T1, acc)))
+        Nil
+
+val r2 : transaction string =
+        ls <- r1;
+        return (case ls of
+                    Nil => "Problem"
+                  | Cons ({B = b, ...}, _) => b)
+
+val main : unit -> transaction page = fn () =>
+        s <- r2;
+        return <html><body>
+                {cdata s}
+        </body></html>