Re: [Haskell-cafe] Missing mil classes for RWST.CPS (was: Coercing newtype-wrapped monad transformers?)

On May 10, 2020, at 19:55, Viktor Dukhovni wrote:

I should probably mention that the reason I'm having to jump through these hoops with boilerplate code is that neither "mtl", nor "transformers" provide "MonadReader", "MonadWriter", "MonadState" or just "MonadRWS" instances for RWS.CPS,

The instances are already present on master (I added them) but they have not yet been released to Hackage. Remarkably, mtl seems to be without a maintainer. See https://github.com/haskell/mtl/issues/69 https://github.com/haskell/mtl/issues/69. Alexis