ghc-microlens-contra

True folds and getters for microlens

This package provides 'Fold' and 'Getter' that are fully compatible with lens; the downside is that this package depends on contravariant, which in its turn depends on a lot of other packages (but still less than lens). The difference between 'Fold' and 'SimpleFold' is that you can use e.g. 'takingWhile'/'droppingWhile' and 'backwards' on the former but not on the latter. Most functions from lens that work with 'Fold' would work with 'SimpleFold' as well, tho. This package is a part of the<http://hackage.haskell.org/package/microlens microlens>family; see the readme<https://github.com/aelve/microlens#readme on Github>.

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