Mercurial > urweb
view tests/datatypeP.ur @ 425:7009b0ac1501
Properly freeing libpq results on errors
author | Adam Chlipala <adamc@hcoop.net> |
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date | Fri, 24 Oct 2008 17:30:07 -0400 |
parents | 71bafe66dbe1 |
children |
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datatype option a = None | Some of a val none : option int = None val some_1 : option int = Some 1 val f = fn t ::: Type => fn x : option t => case x of None => None | Some x => Some (Some x) val none_again = f none val some_1_again = f some_1 val show = fn t ::: Type => fn x : option t => case x of None => "None" | Some _ => "Some" val page = fn x => <html><body> {cdata (show x)} </body></html> val main : unit -> page = fn () => <html><body> <li><a link={page none_again}>None</a></li> <li><a link={page some_1_again}>Some 1</a></li> </body></html>