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

Louis Wasserman wasserman.louis at gmail.com
Wed Feb 18 22:51:32 EST 2009

Yes, it really is like MonadIO -- just capable of being used to produce
guaranteed purely functional results ^^
Louis Wasserman
wasserman.louis at gmail.com

On Wed, Feb 18, 2009 at 5:43 PM, Henning Thielemann <
lemming at henning-thielemann.de> wrote:

> 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.
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