keys

Keyed functors and containers

BSD-3-Clause licensed by Edward A. Kmett

Maintained by Edward A. Kmett

This version can be pinned in stack with:keys-3.12.3@sha256:6a4ef6d1513c79d2d7e2abaf2cdbf0078c90d32092dfa86827adf8b17c78182e,2237

Depends on 12 packages(full list with versions):

Used by 5 packages in lts-18.6(full list with versions):

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

Add Keyed, Indexable, Lookup, Adjustable, FoldableWithKey, and TraversableWithKey instances for Control.Applicative.Const and Data.Functor.Constant.Constant.

Use more efficient implementations of lookup, adjust, foldMapWithKey, and traverseWithKey if building against containers-0.5.8 or later.

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.