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Description | ||||||||
Classes for monad transformers. A monad transformer makes new monad out of an existing monad, such that computations of the old monad may be embedded in the new one. To construct a monad with a desired set of features, one typically starts with a base monad, such as Identity, [] or IO, and applies a sequence of monad transformers. Most monad transformer modules include the special case of applying the transformer to Identity. For example, State s is an abbreviation for StateT s Identity. Each monad transformer also comes with an operation runXXX to unwrap the transformer, exposing a computation of the inner monad. | ||||||||
Documentation | ||||||||
module Control.Monad.Trans.Class | ||||||||
module Control.Monad.IO.Class | ||||||||
Produced by Haddock version 2.7.2 |