Ur/Web: demo/tcSum.ur annotate

Basic tail recursion introduction seems to be working

author	Adam Chlipala <adamc@hcoop.net>
date	Thu, 17 Sep 2009 16:35:11 -0400
parents	669ac5e9a69e
children	8d3aa6c7cee0

rev	line source
adamc@823	1 fun sum [t] (_ : num t) [fs ::: {Unit}] (fl : folder fs) (x : $(mapU t fs)) =
adamc@417	2 foldUR [t] [fn _ => t]
adamc@823	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>

Mercurial > urweb