MonadCompose: Methods for composing monads.

Methods for composing monads.

The IO monad transformer solves the problem of combining two IO-performing monads, so that neither one needs to provide a MonadIO interface and both can be transformed separately.

Most known monads have a distributive law. The Distributive module implements distributivity for monad transformers.

A monad transformer can transform another monad, but if you have two monads both lacking a transformer, there is little you can do in general. However, you can compose them in a coproduct construction. The PlusMonad module implements a similar plan, but differs from coproducts in that it doesn't compress together contiguous uses of a monad.

Modules

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• MonadCompose-0.8.3.0.tar.gz [browse] (Cabal source package)
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