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diff demo/sum.ur @ 411:06fcddcd20d3

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Sum demo, minus inference of {Unit}s
author Adam Chlipala <adamc@hcoop.net>
date Tue, 21 Oct 2008 19:24:39 -0400
parents
children df4cbd90a26e
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/demo/sum.ur	Tue Oct 21 19:24:39 2008 -0400
@@ -0,0 +1,9 @@
+fun sum (fs :: {Unit}) (x : $(mapUT int fs)) =
+    foldUR [int] [fn _ => int]
+    (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] n acc => n + acc)
+    0 [fs] x
+
+fun main () = return <xml><body>
+  {[sum [[A, B]] {A = 0, B = 1}]}<br/>
+  {[sum [[C, D, E]] {C = 2, D = 3, E = 4}]}
+</body></xml>