The first-class-patterns package
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.
|Versions||0.1.0, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.2.1, 0.3.2.2|
|Change log||None available|
|Dependencies||base (>=4.5 && <5), transformers (>=0.1.0 && <0.2.3) [details]|
|Author||Reiner Pope, Brent Yorgey|
|Maintainer||Brent Yorgey <email@example.com>|
|Source repository||head: git clone git://github.com/reinerp/first-class-patterns.git|
|Uploaded||Thu Mar 8 23:50:00 UTC 2012 by ReinerPope|
|Downloads||1033 total (60 in last 30 days)|
|Status||Docs not available [build log]|
All reported builds failed as of 2015-05-27 [all 2 reports]
- first-class-patterns-0.3.0.tar.gz [browse] (Cabal source package)
- Package description (included in the package)
For package maintainers and hackage trustees