Mercurial > urweb

view demo/sum.ur @ 2013:77cc9169d6e0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Change context-local memory allocation to return word-aligned addresses (based on patch by Evan Danaher)
author Adam Chlipala <adam@chlipala.net>
date Sun, 18 May 2014 18:58:50 -0400
parents 8d3aa6c7cee0
children
line wrap: on
line source
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>