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
cookie pair : int * float
cookie option : option int
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;
p <- getCookie pair;
p <- return (getOpt p (1, 2.3));
sp <- source (4, 5.6);
o <- getCookie option;
o <- return (getOpt o (Some 1));
op <- source None;
return
{[n]}}/>
CHANGE
{[f]}}/>
CHANGE
{[s]}}/>
CHANGE
{[b]}}/>
CHANGE
{[p.1]}, {[p.2]}}/>
CHANGE
return None
| Some x => return {[x]}}/>
CHANGE