hugs / ghc difference over '(..)' imports

[Duncan Coutts]

On 2002.02.18 11:11:08 +0000 Simon Marlow wrote:
> > 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*.

I just tested this with the hugs December 2001 version and it still exhibits 
this behaviour.
Hopefully this can be added to some 'bug list' somewhere.

Duncan