jbracker/haskell-chart — pull request #1 by timbod7 (2013-07-17 10:19:56+00:00)
Title: Simplify abstract-drawing backend

As discussed, this contains the changes to:

- Renamed Backend/Utils.hs -> Backend/Impl.hs
- Moved content of Backend.hs -> Backend/Impl.hs
- Made Backend.hs backend a clean API view on Backend/Impl.hs

However it also contains a significant change to the "deep embedded" backend. I experimented with removing the Monad transformer stack, and managing the environment within the operational program. This way:

- the environment is specific to each backend
- there's quite a bit less code and it's simpler (I think)
- you don't need any language extensions

Let me know what you think.