This package provides a bunch of ad hoc classes for accessing parts of a container.
In practice this package is largely subsumed by the lens package, but it is maintained for now
as it has much simpler dependencies.
Contact Information
Contributions and bug reports are welcome!
Please feel free to contact me through github or on the #haskell IRC channel on irc.freenode.net.
-Edward Kmett
Changes
3.12.4 [2024.12.06]
Require building with GHC 8.0 or later.
3.12.3 [2020.01.29]
Add Keyed, Indexable, Lookup, Adjustable, FoldableWithKey, and
TraversableWithKey instances for Control.Applicative.Const and
Data.Functor.Constant.Constant.
3.12.2 [2019.05.02]
Use more efficient implementations of lookup, adjust, foldMapWithKey,
and traverseWithKey if building against containers-0.5.8 or later.
3.12.1 [2018.07.03]
Allow building with containers-0.6.
Avoid the use of deprecated functions from containers.
3.12 [2018.01.28]
Add instances for data types in GHC.Generics. Change the existing instances
for Data.Functor.Sum to be consistent with those for (GHC.Generics.:+:).
Add instances for Proxy and Tagged.
Add instances for ZipList.
Add MINIMAL sets for Zip and FoldableWithKey.
Allow free-5.
3.11
Support for comonad 5
Support for GHC 8
Support for transformers 0.5
3.10.2
Support for semigroupoids 5
3.10.1
Support for transformers 0.4
3.10
Updated to use free, semigroupoids, comonad version 4.0
