{- From: http://en.wikibooks.org/wiki/Haskell/Monad_transformers
if for instance we apply StateT to the List monad, a function that returns a
list (i.e., a computation in the List monad) can be lifted into StateT s [],
where it becomes a function that returns a StateT (s -> [(a,s)]). That is, the
lifted computation produces multiple (value,state) pairs from its input state.
-}
import Control.Monad.Trans.State.Lazy
type GeneratorState = StateT Int
-- a function in the list monad
f :: Int -> [Int]
f n = [0..n]
Will someone please demonstrate the above comment from the wiki page.
Michael
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