Andrew J Bromage <[EMAIL PROTECTED]> wrote: > G'day all. > On Fri, Jan 31, 2003 at 01:54:26PM -0600, Jon Cast wrote:
> > Otherwise, though, see my other post on this subject: > > unsafePerformIO will perform its action when the variable is > > accessed, so you can't write a Haskell program which differentiates > > between what any compiler actually does and running the variable > > allocations before main. > As has been pointed out, there is no language requirement for a > Haskell implementation to be "fully lazy". In particular, it is > technically possible for an implementation to garbage collect > globalVar and re-evaluate it on the next call. So, the technique is implementation-dependent. Since Hughes' recommendation is equally non-portable, I don't see this as a serious problem in this case. > Haskell 2 should probably have a pragma controlling this. IMO, that would be a good idea :) > Cheers, > Andrew Bromage _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
