[Haskell-cafe] ANNOUNCE: pqueue-mtl, stateful-mtl

[Henning Thielemann]

On Mon, 16 Feb 2009, Louis Wasserman wrote:

> I just posted stateful-mtl and pqueue-mtl 1.0.2, making use of the new approach to
> single-threaded ST wrapping.  I discovered while making the modifications to both packages that
> the MonadSTTrans type class was unnecessary, enabling a cleaner integration with mtl proper.  I'm
> pretty confident that this approach is airtight, but let me know if you encounter contradictions
> or problems.

Btw. there is now also the "transformers" package. It's Haskell 98, 
however this is certainly not an issue for you, since higher-rank-types as 
in runST are not Haskell 98 anyway.