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comparison tests/option.ur @ 244:71bafe66dbe1

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Laconic -> Ur
author Adam Chlipala <adamc@hcoop.net>
date Sun, 31 Aug 2008 08:32:18 -0400
parents tests/option.lac@ab86aa858e6c
children 77a28e7430bf
comparison
equal deleted inserted replaced
243:2b9dfaffb008 244:71bafe66dbe1
1 datatype option a = None | Some of a
2
3 val none_Hi : option string = None
4 val some_Hi = Some "Hi"
5 val none_some_Hi : option (option string) = None
6 val some_some_Hi = Some some_Hi
7
8 val show = fn x => case x of None => "None" | Some x => x
9
10 val show2 = fn x => case x of None => "None'" | Some x => show x
11
12 val page = fn x => <html><body>
13 {cdata (show x)}
14 </body></html>
15
16 val page2 = fn x => <html><body>
17 {cdata (show2 x)}
18 </body></html>
19
20 val main : unit -> page = fn () => <html><body>
21 <li><a link={page none_Hi}>None1</a></li>
22 <li><a link={page some_Hi}>Some1</a></li>
23 <li><a link={page2 none_some_Hi}>None2</a></li>
24 <li><a link={page2 some_some_Hi}>Some2</a></li>
25 </body></html>