Ur/Web: demo/sum.ur annotate

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

rev	line source
adamc@411	1 fun sum (fs :: {Unit}) (x : $(mapUT int fs)) =
adamc@411	2 foldUR [int] [fn _ => int]
adamc@411	3 (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] n acc => n + acc)
adamc@411	4 0 [fs] x
adamc@411	5
adamc@411	6 fun main () = return <xml><body>
adamc@411	7 {[sum [[A, B]] {A = 0, B = 1}]}<br/>
adamc@411	8 {[sum [[C, D, E]] {C = 2, D = 3, E = 4}]}
adamc@411	9 </body></xml>

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