On Thursday, 2003-06-12, 18:01, CEST, Filip wrote:
> Hi,
>
> I wrote something like "let t = try (hGetLine h1)" and I would like to check
> is it EOFError or not. How can I do this ??
>
> Thanks
Hello,
the above code assigns the I/O action
try (hGetLine h1)
to t. I suppose you want to assign the result of this action to t. If this is
the case, you have to write
t <- try (hGetLine h1).
You can then examine t as in the following example:
t <- try (hGetLine h1)
case t of
Left error | isEOFError error
-> do <EOF handling>
Right result
-> do <normal continuation>
A better way might be to use catch which is exported from the Prelude.
Wolfgang
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