pkgsrc-wip/hs-lens/DESCR
Ryosuke Moro 24a376c60f Import lens-3.9.0.3 as wip/hs-lens.
This package comes "Batteries Included" with many useful lenses for the
types commonly used from the Haskell Platform, and with tools for
automatically generating lenses and isomorphisms for user-supplied data
types.

The combinators in Control.Lens provide a highly generic toolbox for
composing families of getters, folds, isomorphisms, traversals, setters and
lenses and their indexed variants.

An overview, with a large number of examples can be found in the README:
https://github.com/ekmett/lens#lens-lenses-folds-and-traversals

A video on how to use lenses and how they are constructed is available from
youtube: http://youtu.be/cefnmjtAolY?hd=1

Slides can be obtained here:
http://comonad.com/haskell/Lenses-Folds-and-Traversals-NYC.pdf

More information on the care and feeding of lenses, including a brief
tutorial and motivation for their types can be found on the lens wiki:
https://github.com/ekmett/lens/wiki
2013-08-31 08:47:43 +00:00

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This package comes "Batteries Included" with many useful lenses for the
types commonly used from the Haskell Platform, and with tools for
automatically generating lenses and isomorphisms for user-supplied data
types.
The combinators in Control.Lens provide a highly generic toolbox for
composing families of getters, folds, isomorphisms, traversals, setters and
lenses and their indexed variants.
An overview, with a large number of examples can be found in the README:
https://github.com/ekmett/lens#lens-lenses-folds-and-traversals
A video on how to use lenses and how they are constructed is available from
youtube: http://youtu.be/cefnmjtAolY?hd=1
Slides can be obtained here:
http://comonad.com/haskell/Lenses-Folds-and-Traversals-NYC.pdf
More information on the care and feeding of lenses, including a brief
tutorial and motivation for their types can be found on the lens wiki:
https://github.com/ekmett/lens/wiki