annotate forms.ur @ 1:4d8165e8f89a

Some help with building forms
author Adam Chlipala <adam@chlipala.net>
date Thu, 06 Jan 2011 16:45:47 -0500
parents
children 1e04008eaef7
rev   line source
adam@1 1 datatype readiness a = Ready of a | Waiting | Invalid of string
adam@1 2 datatype rpcResult a = Success of a | Failure of string
adam@1 3
adam@1 4 fun warning [a] (s : signal (readiness a)) =
adam@1 5 <xml><dyn signal={v <- s;
adam@1 6 return (case v of
adam@1 7 Invalid s => <xml><b>{[s]}</b></xml>
adam@1 8 | _ => <xml/>)}/></xml>