BTW, I'm not contradicting that the use of global variables can be necessary when interfacing with legacy code, I just don't think it's the right design when doing something new.
-- Lennart On Tue, Aug 26, 2008 at 9:47 PM, Adrian Hey <[EMAIL PROTECTED]> wrote: > Lennart Augustsson wrote: >> >> Making a network stack from peek and poke is easy in a well structured OS. >> The boot loader (or whatever) hands you the capability (call it >> something else if you want) to do raw hardware access, and you build >> from there. If you look at well structured OSs like NetBSD, this is >> pretty much how they work. No hardware drivers use global variables. > > So? We all know this is possible outside Haskell. But I don't want to > rely on mysterious black box OS's to "hand me the capability" any > more than I want to rely on mysterious extant but unimplementable libs > like Data.Unique. Most real world computing infrastructure uses no OS at > all. How could I use Haskell to implement such systems? > > Also (to mis-quote Linus Torvalds) could you or anyone else who agrees > with you please SHOW ME THE CODE in *Haskell*! If scripture is all > that's on offer I'm just not going to take any of you seriously. > > Frankly I'm tired of the patronising lectures that always acompany these > threads. It'd be good if someone who "knows" global variables are evil > could put their code where their mouth is for a change. Fixing up > the base libs to eliminate the dozen or so uses of the "unsafePerformIO > hack" might be a good place to start. I'll even let you change the API > of these libs if you must, provided you can give a sensible explanation > why the revised API is better, safer, more convenient or whatever. > > Regards > -- > Adrian Hey > > > > _______________________________________________ > Haskell-Cafe mailing list > Haskell-Cafe@haskell.org > http://www.haskell.org/mailman/listinfo/haskell-cafe > _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
