[Haskell-cafe] do construct in wxhaskell
abhay.parvate at gmail.com
Sat Apr 12 03:24:53 EDT 2008
The indentation is not right; all the statements after the 'do' keyword need
to start exactly at the same column. In particular, the 'f' in fileContent
and 's' in set should be one below the other. And the 'return ()' also seems
to be displaced; perhaps you want that also exactly below the last 'set' if
it's the part of the last case.
Hope it helps
2008/4/12 Jodi-Ann Prince <j_prince2109 at hotmail.com>:
> hi, im working ona project, and im having problem loading some code in
> onOpen :: Frame a -> TextCtrl b -> MenuItem c -> StatusField -> IO ()
> onOpen f sw mclose status = do mbfname <- fileOpenDialog f False True
> "Open image" fileTypes "" ""
> case (mbfname) of
> (Nothing) -> return ()
> (Just (fname)) -> do
> fileContent <- readFile fname
> set sw [text := fileContent]
> set mclose [enabled := True]
> set status [text := fname]
> return ()
> i keep getting the error : "the last statement in a 'do' construct must be
> an expression."
> ive tried rearranging it many times, but i still get the same error. any
> help would be greatly appreciated.
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