7 Jan
2008
7 Jan
'08
10:28 a.m.
On Mon, 7 Jan 2008, Miguel Mitrofanov wrote:
data Stack a = Stack { run :: [a] -> (a, [a]) }
[...skipped...]
But, I have simply no clue how to fix that. :-( Can anybody give my a hint?
Yes. It's simply impossible. The Stack data type can't be turned into a monad.
What about using the State monad? Still suitable as exercise?