Re: [Haskell-cafe] "back doors" into the IO monad

On Sun, Oct 24, 2010 at 10:22 AM, Nicolas Pouillard wrote:

On Sun, 24 Oct 2010 00:28:37 +0200, Manlio Perillo wrote:

...

Hi.

What are the available methods to execute IO actions from pure code?

I know only unsafePerformIO and foreign import (to call a non pure foreign function).

unsafeCoerce is a back door for almost everything.

The mueval tests also include this fun example: 'runST (unsafeIOToST (readFile "/etc/passwd"))' -- gwern http://www.gwern.net/