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monad-control-0.3: Lift control operations, like exception catching, through monad transformers

The monad-control package

This package defines the type class MonadBaseControl, a subset of MonadBase into which generic control operations such as catch can be lifted from IO or any other base monad. Instances are based on monad transformers in MonadTransControl, which includes all standard monad transformers in the transformers library except ContT.

See the lifted-base package which uses monad-control to lift IO operations from the base library (like catch or bracket) into any monad that is an instance of MonadBase or MonadBaseControl.

Note that this package is a rewrite of Anders Kaseorg's monad-peel library. The main difference is that this package provides CPS style operators and exploits the RankNTypes and TypeFamilies language extensions to simplify and speedup most definitions.

The following critertion based benchmark shows that monad-control is on average about 99% faster than monad-peel:

git clone https://github.com/basvandijk/bench-monad-peel-control

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• monad-control-0.3.tar.gz (Cabal source package)
• package description (included in the package)

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