[Haskell-cafe] Can we come out of a monad?

[John Lato]

On Tue, Aug 10, 2010 at 6:48 AM, Edward Z. Yang <ezyang at mit.edu> wrote:
> Excerpts from Luke Palmer's message of Tue Aug 10 01:04:04 -0400 2010:
>> Except, of course, you want the signature
>>
>>   evalCont :: Cont r a -> a
>>
>> Which is not possible.  But I am not sure where all this discussion is
>> coming from, Maybe and (r ->) cannot be broken out of.  Isn't that
>> example enough?
>
> I'm confused... that's the type of evalCont, no?

Except that I messed up and "evalCont" doesn't compile.  The type
would have to be
  evalCont :: Cont a a -> a