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diff tests/caseFfi.lac @ 185:19ee24bffbc0

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FFI datatypes
author Adam Chlipala <adamc@hcoop.net>
date Sun, 03 Aug 2008 17:57:47 -0400
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/caseFfi.lac	Sun Aug 03 17:57:47 2008 -0400
@@ -0,0 +1,28 @@
+extern structure M : sig
+        datatype t = A | B
+        datatype u = C of t | D
+end
+
+val f = fn x => case x of M.A => M.B | M.B => M.A
+
+val t2s = fn x => case x of M.A => "A" | M.B => "B"
+
+val g = fn x => case x of M.C a => M.C (f a) | M.D => M.C M.A
+
+val u2s = fn x => case x of M.C a => t2s a | M.D => "D"
+
+val page = fn x => <html><body>
+        {cdata (t2s x)}
+</body></html>
+
+val page2 = fn x => <html><body>
+        {cdata (u2s x)}
+</body></html>
+
+val main : unit -> page = fn () => <html><body>
+        <li><a link={page M.A}>A</a></li>
+        <li><a link={page M.B}>B</a></li>
+        <li><a link={page2 (M.C M.A)}>C A</a></li>
+        <li><a link={page2 (M.C M.B)}>C B</a></li>
+        <li><a link={page2 M.D}>D</a></li>
+</body></html>