portability of Data.ByteString.Lazy
sven.panne at aedion.de
Fri Nov 24 02:42:41 EST 2006
Am Mittwoch, 22. November 2006 14:18 schrieb Ross Paterson:
> On Wed, Nov 22, 2006 at 12:28:33PM +0000, Malcolm Wallace wrote:
> > Ross Paterson <ross at soi.city.ac.uk> wrote:
> > > > > Data.ByteString.Lazy defines ByteString as a type synonym, and
> > > > > then uses that in instances, which isn't permitted by Haskell 98.
> > I recently sent some patches to the fps package, to enable it to build
> > with nhc98. They simply change these instance decls to use the original
> > type name rather than the synonym. (The original name was even in
> > scope, so there was no compelling reason to use the synonym in the first
> > place.)
> There is the minor issue of which name appears in the Haddock docs.
In the OpenGL package this is "solved" via preprocessing:
I haven't followed the Haskell' discussion in detail, but I hope that this
restriction on instances will be dropped.
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