[Haskell] ANNOUNCE: generator 0.5.1

Bas van Dijk v.dijk.bas at gmail.com
Thu Jul 16 03:18:28 EDT 2009

On Wed, Jul 15, 2009 at 3:33 PM, Yair Chuchem<yairchu at gmail.com> wrote:
> A new "generator" package has been uploaded to Hackage.
> It implements an alternative list monad transformer, a list class, and
> related functions.

I see you define ListT as a datatype:


Can't you better define it as a newtype and so avoid the overhead of
constructing and deconstructing ListTs? Or do you need to worry about

BTW, note that your ListT is also similar to my StreamT:

 (not on Hackage)



More information about the Haskell mailing list