> There is a difference between hugs and ghc in how they treat
> imports with the
> '(..)' notation. Here's my example:
>
> module CTree(
> --other stuff
> Const(..)
> ) where
>
> import ATree (Const)
>
> --const has constructors CInt, CChar, CStr
>
> under hugs this module exports CInt, CChar, CStr
> but under ghc it does not. Under ghc it only exports the
> constructors if I
> import 'Const' like this:
>
> import ATree (Const(..))
>
> I don't know which is the right behaviour w.r.t. the H98
> standard, but it
> tripped me up.
GHC is correct here. According to the Haskell 98 report C(..) exports C and all its constructors *that are currently in scope*.
Cheers,
Simon
