first-class-patterns: First class patterns and pattern matching, using type families

[ bsd3, data, library, pattern ] [ Propose Tags ]

This package implements a library of first class patterns. The initial basis for this library was Morten Rhiger's "Type-safe pattern combinators"; the patterns can be used in an almost identical way to those of Morten Rhiger. In a series of blog posts at http://reinerp.wordpress.com/category/pattern-combinators/ the types of patterns were made more revealing using type families, and a simpler implementation was used which avoids some book-keeping.

The library reimplements most of Haskell's built-in pattern matching facilities, plus some more. The pattern matches of this library are lightweight: when GHC's optimisation is turned on, all overhead should be optimised away, leaving a standard Haskell pattern match.

If you're just reading the documentation for this library for the first time, start with Data.Pattern.


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Versions 0.1.0, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.2.1, 0.3.2.2, 0.3.2.3, 0.3.2.4
Change log CHANGES.md
Dependencies base (>=4.5 && <5), transformers (>=0.1.0 && <0.6) [details]
License BSD-3-Clause
Author Reiner Pope, Brent Yorgey
Maintainer Kowainik <xrom.xkov@gmail.com>
Category Data, Pattern
Home page https://github.com/kowainik/first-class-patterns
Bug tracker https://github.com/kowainik/first-class-patterns/issues
Source repo head: git clone git://github.com/kowainik/first-class-patterns.git
Uploaded by shersh at Sun Jun 10 12:57:21 UTC 2018
Distributions LTSHaskell:0.3.2.4, NixOS:0.3.2.4, Stackage:0.3.2.4
Downloads 3042 total (35 in the last 30 days)
Rating 2.0 (votes: 1) [estimated by rule of succession]
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Status Docs available [build log]
Last success reported on 2018-06-10 [all 1 reports]
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Readme for first-class-patterns-0.3.2.4

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first-class-patterns

Build status Hackage

Implements patterns in Haskell as first class objects.