David Leimbach schrieb: > Haskell's great and all but it does have a few warts when it comes to > how much real trust one should put into the type system. > > Some compromises still exist like unsafePerformIO that you can't detect > simply by looking at the types of functions. > > In order to live up to the hype and the marketing around Haskell, really > things like unsafePerformIO should not be allowed at all.
I also do not like the ubiquitous use of unsafePerformIO. However I acknowledge that it allows us to implement things in Haskell that would otherwise need a language and compiler extension, e.g. ByteStrings or ST monad. In the Modula-3 Language Report the section about unsafe features is introduced with the quote: "There are some cases that no law can be framed to cover." (Aristotle) http://www.cs.purdue.edu/homes/hosking/m3/reference/unsafe.html _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
