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fun getOpt (t ::: Type) (o : option t) (v : t) : t =
case o of
None => v
| Some x => x
cookie int : int
cookie float : float
cookie string : string
cookie bool : bool
fun main () : transaction page =
n <- getCookie int;
n <- return (getOpt n 7);
sn <- source 6;
f <- getCookie float;
f <- return (getOpt f 1.23);
sf <- source 4.56;
s <- getCookie string;
s <- return (getOpt s "Hi");
ss <- source "Bye";
b <- getCookie bool;
b <- return (getOpt b True);
sb <- source False;
return <xml><body>
<dyn signal={n <- signal sn; return <xml>{[n]}</xml>}/>
<a onclick={set sn n}>CHANGE</a><br/>
<dyn signal={f <- signal sf; return <xml>{[f]}</xml>}/>
<a onclick={set sf f}>CHANGE</a><br/>
<dyn signal={s <- signal ss; return <xml>{[s]}</xml>}/>
<a onclick={set ss s}>CHANGE</a><br/>
<dyn signal={b <- signal sb; return <xml>{[b]}</xml>}/>
<a onclick={set sb b}>CHANGE</a><br/>
</body></xml>
|
