different flavours of Monad Transformer Library

[Henning Thielemann]

On Sat, 10 Jan 2009, Ross Paterson wrote:

> On Sat, Jan 10, 2009 at 10:20:59PM +0100, Henning Thielemann wrote:
>> What are the changes from transformers-0.0.1.0 to transformers-0.1.0.0 ?
>
> Instances for Applicative and Alternative.

In order to let this work with old versions of base, you will have to 
import the special-functors compatibility package.