[Haskell-cafe] IO in lists
gale at sefer.org
Wed Jan 17 03:07:18 EST 2007
>>> But the list monad  is not a transformer, so you can't lift in it,
>>> even if the contained type happens also to be a monad.
Andrew Bromage wrote:
> ListT is also not a transformer.
True, unfortunately. But it does provide MonadTrans
and MonadIO instances that solve problems like
this in practice.
What can be done to get an improved list transformer
> See here for details:
Can someone with permissions on the new wiki please
get this important page moved over?
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