Copyright	(c) Ross Paterson 2003
License	BSD-style (see the LICENSE file in the distribution)
Maintainer	ross@soi.city.ac.uk
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell98

Control.Arrow.Transformer

Description

Arrow transformers, for making new arrow types out of old ones.

Synopsis

class (Arrow a, Arrow (f a)) => ArrowTransformer (f :: (Type -> Type -> Type) -> Type -> Type -> Type) (a :: Type -> Type -> Type) where
- lift :: a b c -> f a b c

Documentation

class (Arrow a, Arrow (f a)) => ArrowTransformer (f :: (Type -> Type -> Type) -> Type -> Type -> Type) (a :: Type -> Type -> Type) where Source #

Construct a new arrow from an existing one.

Methods

lift :: a b c -> f a b c Source #

A transformation of arrows, preserving arr, >>> and first.

Typical usage in arrow notation:

   proc p -> ...
       (|lift cmd|)

Instances details

Arrow a => ArrowTransformer Automaton a Source #
Instance details Defined in Control.Arrow.Transformer.Automaton Methods lift :: a b c -> Automaton a b c Source #
Arrow a => ArrowTransformer StreamArrow a Source #
Instance details Defined in Control.Arrow.Transformer.Stream Methods lift :: a b c -> StreamArrow a b c Source #
ArrowChoice a => ArrowTransformer (ErrorArrow ex) a Source #
Instance details Defined in Control.Arrow.Transformer.Error Methods lift :: a b c -> ErrorArrow ex a b c Source #
Arrow a => ArrowTransformer (ReaderArrow r) a Source #
Instance details Defined in Control.Arrow.Transformer.Reader Methods lift :: a b c -> ReaderArrow r a b c Source #
Arrow a => ArrowTransformer (StateArrow s) a Source #
Instance details Defined in Control.Arrow.Transformer.State Methods lift :: a b c -> StateArrow s a b c Source #
(Arrow a, Applicative f) => ArrowTransformer (StaticArrow f) a Source #
Instance details Defined in Control.Arrow.Transformer.Static Methods lift :: a b c -> StaticArrow f a b c Source #
(Arrow a, Monoid w) => ArrowTransformer (WriterArrow w) a Source #
Instance details Defined in Control.Arrow.Transformer.Writer Methods lift :: a b c -> WriterArrow w a b c Source #