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comparison 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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184:98c29e3986d3 185:19ee24bffbc0
1 extern structure M : sig
2 datatype t = A | B
3 datatype u = C of t | D
4 end
5
6 val f = fn x => case x of M.A => M.B | M.B => M.A
7
8 val t2s = fn x => case x of M.A => "A" | M.B => "B"
9
10 val g = fn x => case x of M.C a => M.C (f a) | M.D => M.C M.A
11
12 val u2s = fn x => case x of M.C a => t2s a | M.D => "D"
13
14 val page = fn x => <html><body>
15 {cdata (t2s x)}
16 </body></html>
17
18 val page2 = fn x => <html><body>
19 {cdata (u2s x)}
20 </body></html>
21
22 val main : unit -> page = fn () => <html><body>
23 <li><a link={page M.A}>A</a></li>
24 <li><a link={page M.B}>B</a></li>
25 <li><a link={page2 (M.C M.A)}>C A</a></li>
26 <li><a link={page2 (M.C M.B)}>C B</a></li>
27 <li><a link={page2 M.D}>D</a></li>
28 </body></html>