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annotate tests/datatypeP.ur @ 2268:bc1ef958d801

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Thread state through addCaching more carefully.
author Ziv Scully <ziv@mit.edu>
date Wed, 14 Oct 2015 23:10:10 -0400
parents 71bafe66dbe1
children
rev   line source
adamc@191 1 datatype option a = None | Some of a
adamc@191 2
adamc@191 3 val none : option int = None
adamc@191 4 val some_1 : option int = Some 1
adamc@191 5
adamc@191 6 val f = fn t ::: Type => fn x : option t =>
adamc@191 7 case x of None => None | Some x => Some (Some x)
adamc@191 8
adamc@191 9 val none_again = f none
adamc@191 10 val some_1_again = f some_1
adamc@193 11
adamc@193 12 val show = fn t ::: Type => fn x : option t => case x of None => "None" | Some _ => "Some"
adamc@193 13
adamc@193 14 val page = fn x => <html><body>
adamc@193 15 {cdata (show x)}
adamc@193 16 </body></html>
adamc@193 17
adamc@193 18 val main : unit -> page = fn () => <html><body>
adamc@193 19 <li><a link={page none_again}>None</a></li>
adamc@193 20 <li><a link={page some_1_again}>Some 1</a></li>
adamc@193 21 </body></html>