ioToST

[Bulat Ziganshin]

Hello Samuel,

Tuesday, August 25, 2009, 4:36:31 AM, you wrote:

> Shouldn't Control.Monad.ST export ioToST :: IO a -> ST RealWorld a, as
> defined in GHC.IO?

no. ST is a subset of IO monad with a limited set of operators
guaranteeing referential transparence, as a result runST is a pure
operation. if you provide ability to run in ST monad arbitrary
operations, this guarantee will break. there are pother way to do the
same - use IO operations and unsafePerformIO


-- 
Best regards,
 Bulat                            mailto:Bulat.Ziganshin at gmail.com