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

Alexis King lexi.lambda at gmail.com
Mon May 11 18:30:19 UTC 2020

> On May 10, 2020, at 19:55, Viktor Dukhovni <ietf-dane at dukhovni.org> 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

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>.

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