Mercurial > urweb

diff tests/type_class.ur @ 244:71bafe66dbe1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Laconic -> Ur
author Adam Chlipala <adamc@hcoop.net>
date Sun, 31 Aug 2008 08:32:18 -0400
parents tests/type_class.lac@ba4d7c33a45f
children fab5998b840e
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/type_class.ur	Sun Aug 31 08:32:18 2008 -0400
@@ -0,0 +1,18 @@
+class default t = t
+
+val string_default : default string = "Hi"
+val int_default : default int = 0
+
+val default : t :: Type -> default t -> t =
+        fn t :: Type => fn d : default t => d
+val hi = default [string] _
+val zero = default [int] _
+
+val frob : t :: Type -> default t -> t =
+        fn t :: Type => fn _ : default t => default [t] _
+val hi_again = frob [string] _
+val zero_again = frob [int] _
+
+val main : unit -> page = fn () => <html><body>
+        {cdata hi_again}
+</body></html>