arrows-0.2: Arrow classes and transformersSource codeContentsIndex
Control.Arrow.Transformer
Portabilitynon-portable (multi-parameter type classes)
Stabilityexperimental
Maintainerross@soi.city.ac.uk
Description
Arrow transformers, for making new arrow types out of old ones.
Synopsis
class (Arrow a, Arrow (f a)) => ArrowTransformer f a where
lift :: a b c -> f a b c
Documentation
class (Arrow a, Arrow (f a)) => ArrowTransformer f a whereSource
Construct a new arrow from an existing one.
Methods
lift :: a b c -> f a b cSource

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

Typical usage in arrow notation: 

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