Mercurial > urweb
view tests/dynlines.ur @ 2069:262dd74df39c
Replace common "if(!quiet) printf(...)" pattern with a macro
author | Sergey Mironov <grrwlf@gmail.com> |
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date | Tue, 02 Sep 2014 17:36:14 +0000 |
parents | 38297294cf98 |
children |
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datatype lines = End | Line of source lines type t = { Head : source lines, Tail : source (source lines) } val create = head <- source End; tail <- source head; return {Head = head, Tail = tail} fun renderL lines = case lines of End => <xml/> | Line linesS => <xml>X<br/><dyn signal={renderS linesS}/></xml> and renderS linesS = lines <- signal linesS; return (renderL lines) fun render t = renderS t.Head fun write t = oldTail <- get t.Tail; newTail <- source End; set oldTail (Line newTail); set t.Tail newTail fun main () : transaction page = b <- create; return <xml><body> <button onclick={fn _ => write b}/> <dyn signal={render b}/> </body></xml>