[Haskell-cafe] How to understand such a newtype ?

Cristiano Paris frodo at theshire.org
Sun Nov 22 04:50:26 EST 2009

On Sun, Nov 22, 2009 at 3:47 AM, Felipe Lessa <felipe.lessa at gmail.com> wrote:
> ...
> Well, “ReaderT XConf (StateT XState IO) a” is *the* type :).
> It's a monad that is a Reader of XConf and has a State of XState.

... and also wraps a monad to allow IO access inside the X monad.


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