[Haskell-cafe] Parsec float

[Bryan O'Sullivan]

On Fri, May 29, 2009 at 3:38 PM, Bartosz Wójcik <bartek at sudety.it> wrote:

> Thank you, this is an easy and nice solution. I've made it a bit prettier
> optically:
>
> myFloat = try (symbol "-" >> float >>= return . negate)
>     <|>  try float
>     <|>  (integer >>= return . fromIntegral)
>

Any time you see ">>= return .", something is being missed. Use liftM or <$>
instead, i.e. "fromIntegral <$> integer" instead of "integer >>= return .
fromIntegral".
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