ekmett/lens — pull request #306 by pthariensflame (2013-05-07 23:55:40+00:00)
Title: Added `Control.Monad.Primitive.Lens`

The `primitive` library is pulled in anyway buy `vector`, so we might as well take advantage of it.

I tried to add `Wrapped` instances for the various `Data.Primitive` types, but I couldn't get around the kind mismatch between `*` and `#`. :(