On Fri, 3 Feb 2006, Ross Paterson wrote:
As another example, Ben Rudiak-Gould recently pointed out that the inclusion of stToIO breaks threaded state reasoning for ST, e.g. readSTRef won't necessarily get what your last writeSTRef wrote (because the region might be RealWorld, with other threads modifying it).
You can still reason about something of type ST s a, it's just with the proviso that the reasoning is only correct when it is (perhaps indirectly) invoked by runST.
Cheers, Ganesh _______________________________________________ Haskell-prime mailing list [email protected] http://haskell.org/mailman/listinfo/haskell-prime
