S. Alexander Jacobson wrote:
Nothing actually happens when newChan is called except construction of a new datastructure. It would be nice to have non IO monad code be able to create a new Chan that gets passed to IO code that uses it somewhere else.
Alternatively, is there a way to create a Chan outside the IO monad?
I'm sure I'll get death threats for posting this but here it goes: C:\>hugs __ __ __ __ ____ ___ _________________________________________ || || || || || || ||__ Hugs 98: Based on the Haskell 98 standard ||___|| ||__|| ||__|| __|| Copyright (c) 1994-2003 ||---|| ___|| World Wide Web: http://haskell.org/hugs || || Report bugs to: hugs-bugs@haskell.org || || Version: Nov 2003 _________________________________________ Haskell 98 mode: Restart with command line option -98 to enable extensions Type :? for help Prelude> :l IOExts IOExts> :t unsafePerformIO unsafePerformIO :: IO a -> a IOExts> Personally I think the usage of unsafePerformIO is fine (but don't overuse it!). It's akin to the unsafe keyword in C#. All you're really doing is saying "Look, GHC, I know you don't like this stuff but I _promise_ that this code won't screw anything up for you", and as the programmer you should be allowed to say that every now and then. /S -- Clothes make the man. Naked people have little or no influence on society. - Mark Twain