Mercurial > urweb
annotate demo/tcSum.ur @ 744:1ef3c1ef617d
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author | Adam Chlipala <adamc@hcoop.net> |
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date | Sun, 26 Apr 2009 10:54:45 -0400 |
parents | aa2290c32ce2 |
children | 669ac5e9a69e |
rev | line source |
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adamc@643 | 1 fun sum (t ::: Type) (_ : num t) (fs ::: {Unit}) (fl : folder fs) (x : $(mapU t fs)) = |
adamc@417 | 2 foldUR [t] [fn _ => t] |
adamc@417 | 3 (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] n acc => n + acc) |
adamc@632 | 4 zero [fs] fl x |
adamc@417 | 5 |
adamc@417 | 6 fun main () = return <xml><body> |
adamc@633 | 7 {[sum {A = 0, B = 1}]}<br/> |
adamc@633 | 8 {[sum {C = 2.1, D = 3.2, E = 4.3}]} |
adamc@417 | 9 </body></xml> |