Mercurial > urweb
annotate tests/dlist2.ur @ 905:7a4b026e45dd
Library improvements; proper list [un]urlification; remove server-side ServerCalls; eta reduction in type inference
| author | Adam Chlipala <adamc@hcoop.net> |
|---|---|
| date | Sun, 09 Aug 2009 16:13:27 -0400 |
| parents | 1a9171e31fd1 |
| children |
| rev | line source |
|---|---|
| adamc@605 | 1 datatype dlist = Nil | Cons of string * source dlist |
| adamc@605 | 2 |
| adamc@605 | 3 fun delist dl = |
| adamc@605 | 4 case dl of |
| adamc@605 | 5 Nil => <xml>[]</xml> |
| adamc@605 | 6 | Cons (x, s) => <xml>{[x]} <ctextbox/> :: {delistSource s}</xml> |
| adamc@605 | 7 |
| adamc@605 | 8 and delistSource s = <xml><dyn signal={dl <- signal s; return (delist dl)}/></xml> |
| adamc@605 | 9 |
| adamc@605 | 10 fun main () : transaction page = |
| adamc@605 | 11 tail0 <- source Nil; |
| adamc@605 | 12 tail <- source tail0; |
| adamc@605 | 13 tb <- source ""; |
| adamc@605 | 14 return <xml><body> |
| adamc@605 | 15 {delist (Cons ("ROOT", tail0))} |
| adamc@605 | 16 <br/> |
| adamc@605 | 17 <ctextbox source={tb}/> |
| adamc@605 | 18 <button value="Add" onclick={hd <- get tb; |
| adamc@605 | 19 tl <- source Nil; |
| adamc@605 | 20 old <- get tail; |
| adamc@605 | 21 |
| adamc@605 | 22 set old (Cons (hd, tl)); |
| adamc@605 | 23 set tail tl}/> |
| adamc@605 | 24 <button value="Reset" onclick={set tail0 Nil; set tail tail0}/> |
| adamc@605 | 25 </body></xml> |