Hi,
Excuse me for resubmitting my Problem with Hugs1.4June / Hugs981111.
I just discovered that the code in my last mail was incomplete.
Here it is (somehow simplified:)
data SpecialOptions = SpecialOptions { x :: Int }
deriving (Show, Read)
data Options = Options { s :: SpecialOptions }
deriving (Show, Read)
initOptions = Options { s = SpecialOptions{x=42} }
main :: Options
main = (read . show) initOptions
This program gives
Program error: PreludeText.read: no parse
main :: Int
main = (read . show) 42
works fine. The problem is that the show/read functions for
nested data structures are incompatible...
Does anyone know how to fix it?
Regards,
Jan
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