Re: unsafePerformIO and cooperative concurrency

On Mon, Apr 24, 2006 at 01:57:57PM +0100, Simon Marlow wrote:

Given that unsafePerformIO is (perhaps) to be part of the Haskell' standard, the combination of unsafePerformIO and cooperative concurrency introduces some interesting cases that will probably have to be declared to be undefined in the standard - what happens when you yield or do some I/O inside unsafePerformIO?

I put a small note on the wiki about this saying behavior should be implementation specific. I don't think we should try to define any particular behavior for unsafePerformIO trickiness. John -- John Meacham - ⑆repetae.net⑆john⑈