Indeed, thank you. mtl is cruel with me for
the second time uumpf. But it's strange mtl
just reexports transformer's module
2012/6/23 MigMit
On 23 Jun 2012, at 21:27, Anton Kholomiov wrote:
At last..
No, it wants me to define an instance for (StateT s) which is supposed to be defined be the authors of the library.
Actually I discovered that I have two libraries called transformers.
transformers-0.2.2.0 transformers-0.3.0.0
So when I'm doing
import Control.Monad.Trans (0.2.2.0)
Ehm... seems like you're importing mtl instead of transformers. AFAIK there is no "Control.Monad.Trans" module in transformers.
I get the error
And when I'm doing
import Control.Monad.Trans.Class (0.2.2.0)
It compiles.
Anton
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