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con meta = fn (db :: Type, widget :: Type) =>
{Nam : string,
Show : db -> xbody,
Widget : nm :: Name -> xml form [] [nm = widget],
WidgetPopulated : nm :: Name -> db -> xml form [] [nm = widget],
Parse : widget -> db,
Inject : sql_injectable db}
fun default [t] (sh : show t) (rd : read t) (inj : sql_injectable t) name : meta (t, string) =
{Nam = name,
Show = txt,
Widget = fn [nm :: Name] => <xml><textbox{nm}/></xml>,
WidgetPopulated = fn [nm :: Name] n =>
<xml><textbox{nm} value={show n}/></xml>,
Parse = readError,
Inject = _}
val int = default
val float = default
val string = default
fun bool name = {Nam = name,
Show = txt,
Widget = fn [nm :: Name] => <xml><checkbox{nm}/></xml>,
WidgetPopulated = fn [nm :: Name] b =>
<xml><checkbox{nm} checked={b}/></xml>,
Parse = fn x => x,
Inject = _}
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