On 19 April 2005 12:15, Malcolm Wallace wrote:

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Control.Monad.Reader (Reader, runReader, ask, local) Control.Monad.Error (instance MonadPlus IO)

These have H98 implementations, as far as I'm aware.

The mtl package requires multi-param classes and functional dependencies. Where are the H'98 versions?

oops, you're right. But instance MonadPlus IO is ok. Cheers, Simon