No, I think Artyom meant "assuming IO is lazy". He intended to show that, indeed, it is not, or else side-effects would never be performed
2011/5/31 Scott Lawrence <byt...@gmail.com> > On 05/31/2011 04:20 PM, Artyom Kazak wrote: > > Suppose iRecurse looks like this: > > iRecurse = do > > x <- launchMissiles > > r <- iRecurse > > return 1 > > > > As x is never needed, launchMissiles will never execute. It obviously is > > not what is needed. > > Prelude> let launchMissiles = putStrLn "UH OH" >> return 1 > Prelude> let iRecurse = launchMissiles >> return 1 > Prelude> iRecurse > UH OH > 1 > Prelude> > > Looks like launchMissiles /does/ execute, even though x is (obviously) > never needed. > > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > >
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