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diff tests/type_class.lac @ 212:ba4d7c33a45f

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Testing type-class-parameterized functions
author Adam Chlipala <adamc@hcoop.net>
date Sat, 16 Aug 2008 14:36:17 -0400
parents e86411f647c6
children
line wrap: on
line diff
--- a/tests/type_class.lac	Sat Aug 16 14:32:18 2008 -0400
+++ b/tests/type_class.lac	Sat Aug 16 14:36:17 2008 -0400
@@ -1,9 +1,18 @@
 class default t = t
 
-val string_default : default string = ""
+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 empty = default [string] _
+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>