[Haskell-cafe] Safe way to parse arguments?
xj2106 at columbia.edu
Sat Jun 21 15:46:57 EDT 2008
Don Stewart <dons at galois.com> writes:
> The main thing is to define a safe read. This will be in the base
> library soon,
> maybeRead :: Read a => String -> Maybe a
> maybeRead s = case reads s of
> [(x, "")] -> Just x
> _ -> Nothing
> Then you can pattern match on the failure case as Nothing.
When will it be in the base library?
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