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Catch UnboundNamed exceptions that arise from missing signature items
author Adam Chlipala <adam@chlipala.net>
date Fri, 21 Oct 2011 08:51:30 -0400
parents e955d50c389d
children
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line source
fun main () : transaction page =
  x <- source <xml>A</xml>;
  y <- source <xml>B</xml>;
  return <xml><body>
    <dyn signal={x <- signal x; y <- signal y; return <xml>{x}, {y}</xml>}/>
    <br/>
    <a onclick={set x <xml>C</xml>}>Change x</a><br/>
    <a onclick={set y <xml>D</xml>}>Change y</a><br/>
  </body></xml>