On Tue, 3 Jan 2017, Erik de Castro Lopo wrote:
Edward Kmett wrote:
If you can get the extra combinators into transformers, I might be able to offer a C.M.T.E.Compat module that you could import along with C.M.T.E to get the new API across those intermediate versions, but I've yet to adopt this practice for the other transformers modules. If someone wanted to toss a patch at transformers-compat that added .Compat modules with the changes to the transformers API over time, (like adding reader, state, writer combinators), I'd probably take the patch, but I don't have a definitive list of what they are and the design would involve some compromises.
I found another solution.
If alternative packages are an option you may also try my: http://hackage.haskell.org/package/explicit-exception