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view demo/sum.ur @ 1657:2b7d3d99dc42
Prevent unifications of 'others' pieces in record summaries, when both pieces contain unification variables (to prevent undesired unifications)
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Thu, 05 Jan 2012 17:10:43 -0500 |
| parents | 8d3aa6c7cee0 |
| children |
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fun sum [fs ::: {Unit}] (fl : folder fs) (x : $(mapU int fs)) = @foldUR [int] [fn _ => int] (fn [nm :: Name] [rest :: {Unit}] [[nm] ~ rest] n acc => n + acc) 0 fl x fun main () = return <xml><body> {[sum {}]}<br/> {[sum {A = 0, B = 1}]}<br/> {[sum {C = 2, D = 3, E = 4}]} </body></xml>