Mercurial > urweb

comparison demo/tcSum.ur @ 823:669ac5e9a69e

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Demo compiles with pattern-matching-fu
author Adam Chlipala <adamc@hcoop.net>
date Thu, 28 May 2009 10:35:25 -0400
parents aa2290c32ce2
children 8d3aa6c7cee0
comparison
equal deleted inserted replaced
822:d4e811beb8eb 823:669ac5e9a69e
1 fun sum (t ::: Type) (_ : num t) (fs ::: {Unit}) (fl : folder fs) (x : $(mapU t fs)) = 1 fun sum [t] (_ : num t) [fs ::: {Unit}] (fl : folder fs) (x : $(mapU t fs)) =
2 foldUR [t] [fn _ => t] 2 foldUR [t] [fn _ => t]
3 (fn (nm :: Name) (rest :: {Unit}) [[nm] ~ rest] n acc => n + acc) 3 (fn [nm :: Name] [rest :: {Unit}] [[nm] ~ rest] n acc => n + acc)
4 zero [fs] fl x 4 zero [fs] fl x
5 5
6 fun main () = return <xml><body> 6 fun main () = return <xml><body>
7 {[sum {A = 0, B = 1}]}<br/> 7 {[sum {A = 0, B = 1}]}<br/>
8 {[sum {C = 2.1, D = 3.2, E = 4.3}]} 8 {[sum {C = 2.1, D = 3.2, E = 4.3}]}