[Haskell-cafe] Hoogle? [Stacking monads]

[Andrew Coppin]

Ryan Ingram wrote:
> There's also a haskell98 way to do the same thing, it's just a bit
> more wordy at the ghci prompt, and a bit more work to decode the
> result:
>
> ghci> :t \z -> (foo (undefined :: Bar x) z :: Bar y)
>
> Now, the type of this expression is clearly
>
>   type of z -> Bar y
>
> So just read the value before the arrow to get your answer.
>   

Ah, ingenious! Why did I not think of that...?