Re: [Haskell-cafe] wondering about a MonadIO instance for a heap data type

On 12 July 2012 06:19, Qi Qi wrote:

Hi,

I was wondering about creating an instance of MonadIO for a heap data. Any hints?

data Heap a = E | T Int a (Heap a) (Heap a) deriving (Eq, Ord, Read, Show)

The reason is that I want to use liftIO during a heapsort to print out intermediate results.

If you just want this for debugging, you're probably better off using Debug.Trace to print the intermediate results. Conrad.