Mercurial > urweb
annotate demo/sum.ur @ 2184:1ecef02f67c5
More Elaborate work to avoid instantiating unification variables with out-of-scope regular variables
| author | Adam Chlipala <adam@chlipala.net> |
|---|---|
| date | Sat, 24 Oct 2015 17:23:07 -0400 |
| parents | 8d3aa6c7cee0 |
| children |
| rev | line source |
|---|---|
| adamc@823 | 1 fun sum [fs ::: {Unit}] (fl : folder fs) (x : $(mapU int fs)) = |
| adamc@1093 | 2 @foldUR [int] [fn _ => int] |
| adamc@1093 | 3 (fn [nm :: Name] [rest :: {Unit}] [[nm] ~ rest] n acc => n + acc) |
| adamc@1093 | 4 0 fl x |
| adamc@411 | 5 |
| adamc@411 | 6 fun main () = return <xml><body> |
| adamc@633 | 7 {[sum {}]}<br/> |
| adamc@633 | 8 {[sum {A = 0, B = 1}]}<br/> |
| adamc@633 | 9 {[sum {C = 2, D = 3, E = 4}]} |
| adamc@411 | 10 </body></xml> |