On Tue, Apr 14, 2009 at 5:42 PM, Luke Palmer <lrpal...@gmail.com> wrote: > > ... > However, the way I see it is that unsafePerformIO *is* evil by itself, and > it is only by the addition of Holy Water that it is benign to use.
That's what I meant but your words are indeed more effective :) > Ryan Ingram described it as a way to achieve "RTS extensions", which I think > is a fine way to put it I consider Debug.Trace to be an instance of this: > we are extending the RTS to provide execution traces. > I guess it's a teaching style thing. Mostly, if someone sees "I have an IO > [XmlTree] and I need an [XmlTree]", I want the "I'm asking the wrong > question" synapse path to fire, rather than the "just use unsafePerformIO" > one. Yes, I think your analysis is correct. Perhaps I was a bit too dry in my original answer. Cristiano _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
