Haskell Platform call for consensus: add transformers and revise the mtl package to depend on it

Ross Paterson ross at soi.city.ac.uk
Mon Nov 8 13:43:25 EST 2010

On Mon, Nov 08, 2010 at 01:22:59PM -0500, Mario Blažević wrote:
> On 10-11-06 11:17 AM, Sebastiaan Visser wrote:
> >Additionally, it would be very useful to have the MaybeT monad
> >transformer included into mtl-2.
> >
> >While migrating my packages from transformers/monads-fd to the new
> >mtl, the absence of MaybeT was the only problem I came across.
> 	What was your reason for doing this, if I may ask? Are there plans
> to deprecate transformers or monads-fd any time soon?

Certainly not transformers, as part of the plan was to expose it for
wider use, but monads-fd is now deprecated in favour of mtl-2.

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