tis 2003-12-02 klockan 14.23 skrev Johannes Waldmann:
> Martin Norb�ck wrote:
>
> > main = do input <- readline "prompt> " ; handle input
>
> but this only reads one line (and it gives a Maybe String)
> I wanted a (lazy) list of all input lines,
> where the user should have the usual line editing functions available.
What do you mean? Readline is for editing one line. If you want
something like getting multiple lines until user presses ctrl-d or
something you can do this:
readlines :: IO [String]
readlines = do
input <- readline ""
case input of
Nothing -> return []
Just str -> do
strs <- readlines
return (str:strs)
It won't be lazy though.
Regards,
Martin
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