Re: [Haskell-cafe] how to check thunk

On Mon, Jul 2, 2012 at 5:29 AM, Kazu Yamamoto wrote:

Hello,

Are there any ways to see if a value is a thunk or memorized? I would like to have a function like: isThunk :: a -> IO Bool

vacuum allow that and much more though I don't know if it still works correctly on GHC 7.4. Anyway your isThunk is

isThunk a = fmap GHC.Vacuum.ClosureType.isThunk GHC.Vacuum.closureType

(Feel free to arrange your imports to make that a bit more readable ;) http://hackage.haskell.org/package/vacuum -- Jedaï