pipes-core: Compositional pipelines

[ bsd3, control, deprecated, enumerator, library ] [ Propose Tags ]
Deprecated. in favor of pipes

This library offers an abstraction similar in scope to iteratees/enumerators/enumeratees, but with different characteristics and naming conventions.

This package is a fork of the original pipes package by Gabriel Gonzalez. See https://github.com/pcapriotti/pipes-core/wiki/pipes-core-vs-pipes for a comparison between the two packages.

Differences with traditional iteratees:

  • Simpler semantics: There is only one data type (Pipe), two basic primitives (await and yield), and only one way to compose Pipes (>+>). In fact, (>+>) is just convenient syntax for the composition operator in Category. Most pipes can be implemented just using the Monad instance and composition.

  • Different naming conventions: Enumeratees are called Pipes, Enumerators are Producers, and Iteratees are Consumers. Producers and Consumers are just type synonyms for Pipes with either the input or output end closed.

  • Pipes form a Category: that means that composition is associative, and that there is an identity Pipe.

  • Vertical concatenation works on every Pipe: (>>), concatenates Pipes. Since everything is a Pipe, you can use it to concatenate Producers, Consumers, and even intermediate Pipe stages. Vertical concatenation can be combined with composition to create elaborate combinators, without the need of executing pipes in "passes" or resuming partially executed pipes.

Check out Control.Pipe for a copious introduction (in the spirit of the iterIO library), and Control.Pipe.Combinators for some basic combinators and Pipe examples.

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Versions [RSS] 0.0.1, 0.1.0
Dependencies base (>=4 && <5), categories (>=1.0 && <1.1), lifted-base (>=0.1 && <0.2), monad-control (>=0.3 && <0.4), transformers (>=0.2 && <0.4), void (>=0.5 && <0.6) [details]
License BSD-3-Clause
Copyright 2012 Gabriel Gonzalez, 2012 Paolo Capriotti
Author Gabriel Gonzalez, Paolo Capriotti
Maintainer p.capriotti@gmail.com
Category Control, Enumerator
Home page https://github.com/pcapriotti/pipes-core
Bug tracker https://github.com/pcapriotti/pipes-core/issues
Source repo head: git clone https://github.com/pcapriotti/pipes-core
Uploaded by PaoloCapriotti at 2012-04-09T21:29:15Z
Distributions NixOS:0.1.0
Downloads 2124 total (3 in the last 30 days)
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Status Docs uploaded by user
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