ghc-microlens

A tiny lens library with no dependencies

This library is an extract from <<a href="http://hackage.haskell.org/package/lens">http://hackage.haskell.org/package/lens</a> lens> (with no dependencies). It's not a toy lenses library, unsuitable for “real world”, but merely a small one. It is compatible with lens, and should have same performance. It also has better documentation. There's a longer readme <<a href="https://github.com/monadfix/microlens#readme">https://github.com/monadfix/microlens#readme</a> on Github>. It has a migration guide for lens users, a description of other packages in the family, a discussion of other lens libraries you could use instead, and so on.