pez: A Pretty Extraordinary Zipper library

[ bsd3, data, library ] [ Propose Tags ]
Versions 0.0.1, 0.0.2, 0.0.3, 0.0.4, 0.1.0
Dependencies base (==4.*), failure (>=0.1), fclabels (>=1.0 && <1.2), thrist (==0.2.*) [details]
License BSD-3-Clause
Copyright Brandon Simmons, 2011
Author Brandon Simmons
Category Data
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Source repo head: git clone -b master
Uploaded by BrandonSimmons at Sat Jan 28 03:50:40 UTC 2012
Distributions NixOS:0.1.0
Downloads 1704 total (12 in the last 30 days)
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PEZ is a generic zipper library. It uses lenses from the "fclabels" package to reference a "location" to move to in the zipper. The zipper is restricted to types in the Typeable class, allowing the user to "move up" through complex data structures such as mutually-recursive types.

Both the Typeable class and fclabels lenses can be derived in GHC, making it easy for the programmer to use a zipper with a minimum of boilerplate.

Please send any feature requests or bug reports along.

Changes 0.0.4 -> 0.1.0:

 - use fclabels 1.0
 - module renamed Data.Label.Zipper
 - 'ZPath' renamed 'Motion', define new Up type and instance
 - fclabels lenses now require wrapping with 'to'
 - 'moveTo' changed to 'move'
 - savedLens renamed flatten
 - SavedPath renamed To
 - removed experimental operators
 - using failure package for exceptions
 - etc., etc.




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