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The optics family of Haskell packages make it possible to define and use Lenses, Traversals, Prisms and other optics, using an abstract interface. They are roughly comparable in functionality with the lens package, but explore a different part of the design space. For a detailed introduction, see the Haddocks for the main Optics module.

Authors and contributors

The authors of the optics family of packages are:

Our thanks go to those who have (involuntarily) contributed code and ideas to optics. In particular, we have liberally reused parts of the lens package by Edward Kmett and contributors.

Package structure

Officially supported packages

Work in progress packages

These packages have not (yet) been officially released. If you find them useful, we would welcome offers to maintain these packages.

Internal packages

These packages are for internal use only, and are not intended to be released: