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view tests/stringToTime.ur @ 2009:799be3911ce3

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Monadic bind supports patterns
author Adam Chlipala <adam@chlipala.net>
date Fri, 02 May 2014 17:16:02 -0400
parents 252e05bf199d
children
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fun main () : transaction page =
    s <- source "";
    return <xml><body>
      <ctextbox source={s}/>
      <button onclick={v <- get s; alert (show (readError v : time))}/>
      <button onclick={v <- get s; case read v : option time of
                                       None => alert "Invalid"
                                     | Some tm => alert (show tm)}/>
    </body></xml>