Mercurial > urweb
view tests/rpcO.ur @ 1808:90ebfac7e1a3
Better error message for funky command lines
author | Adam Chlipala <adam@chlipala.net> |
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date | Sat, 18 Aug 2012 13:51:41 -0400 |
parents | b98f547a6a45 |
children |
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table t : {A : int} fun main () : transaction page = let fun check () = r <- oneRow (SELECT SUM(t.A) AS X FROM t); return (if r.X < 0 then (Some 3, None) else (None, Some "Hi")) fun show (t ::: Type) (_ : show t) (opt : option t) = case opt of None => <xml>None</xml> | Some v => <xml>{[v]}</xml> in s <- source (None, None); return <xml><body> <button value="Get It On!" onclick={r <- check (); set s r}/><br/> <br/> Current: <dyn signal={p <- signal s; return <xml>{show p.1}, {show p.2}</xml>}/> </body></xml> end