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.

more information on the care and feeding of lenses, including a tutorial and motivation for their types can be found on the lens wiki (https://github.com/ekmett/lens/wiki).

this package contains the normal library files.