 | transformers-0.2.1.0: Concrete functor and monad transformers | Contents | Index |
|
| Data.Functor.Identity | | Portability | portable | | Stability | experimental | | Maintainer | libraries@haskell.org |
|
|
|
| Description |
The identity functor and monad.
This trivial type constructor serves two purposes:
- It can be used with functions parameterized by a Functor or Monad.
- It can be used as a base monad to which a series of monad
transformers may be applied to construct a composite monad.
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.
|
|
| Synopsis |
|
|
|
| Documentation |
|
| newtype Identity a |
| Identity functor and monad.
| | Constructors | | Instances | |
|
|
| Produced by Haddock version 2.7.2 |