[Haskell-beginners] Difference between Char and Data.Char modules

[Ken Overton]

I just started looking at the Happy packag; I get a compile error when attempting to build examples/glr/expr-eval:

ExprData.hs:9:8:
    Could not find module `Char'
    It is a member of the hidden package `haskell98-2.0.0.1'.

ExprData.hs:9 says  “import Char” and if I change this to “import Data.Char” it compiles correctly (then I get a similar message for System, but when I understand Char I expect I will understand this too).

Could someone kindly explain the difference between these two modules? From the look of the error, I’m guessing there’s a history lesson involved?

Thanks,

Ken

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