Hello Mark, Thursday, January 3, 2008, 2:13:08 PM, you wrote:
of course *some* overlap exists but in order to understand it you should know exact shape of both methods when i tried to develop complex library without understanding t.c. implementation, i constantly goes into the troubles - things that i (using my OOP experience) considered as possible, was really impossible in Haskell so i'm really wonder why you don't want to learn the topic thoroughly > I loosely do understand....but very loosely....but I'm not, as yet, > convinced it is completely relevant. > The implementation may differ, but that does not mean that there is no > overlap....I am not expecting one model to be a superset of the other, > but I am expecting some sort of overlap between 'interface' > implementation and type class instance declaration. > -----Original Message----- > From: Bulat Ziganshin [mailto:[EMAIL PROTECTED] > Sent: 03 January 2008 10:54 > To: Nicholls, Mark > Cc: Bulat Ziganshin; haskell-cafe@haskell.org > Subject: Re[2]: [Haskell-cafe] Is there anyone out there who can > translate C# generics into Haskell? > Hello Mark, > Thursday, January 3, 2008, 1:22:26 PM, you wrote: > because they have different models. i recommend you to start from > learning this model, otherwise you will don't understand how Haskell > really works and erroneously apply your OOP knowledge to Haskell data > structures. > shortly said, there are 3 ways to polymorphism: > 1) C++ templates - type-specific code generated at compile time > 2) OOP classes - every object carries VMT which allows to select > type-specific operation > 3) type classes - dictionary of type-specific operations is given as > additional hidden argument to each function > Haskell uses t.c. and its abilities are dictated by this > implementation. there is no simple and direct mapping between > features provided by OOP and t.c. >> Can you give me a summary of why it's meaningless.....both would seem > to >> describe/construct values/objects....they may not be equivalent, but I >> would expect some considerable overlap. >> -----Original Message----- >> From: Bulat Ziganshin [mailto:[EMAIL PROTECTED] >> Sent: 02 January 2008 20:29 >> To: Nicholls, Mark >> Cc: haskell-cafe@haskell.org >> Subject: Re: [Haskell-cafe] Is there anyone out there who can > translate >> C# generics into Haskell? >> Hello Mark, >> Wednesday, January 2, 2008, 7:40:31 PM, you wrote: >>> I'm trying to translate some standard C# constucts into Haskell... >> some >> it's meaningless. read >> http://haskell.org/haskellwiki/OOP_vs_type_classes >> and especially papers mentioned in the References -- Best regards, Bulat mailto:[EMAIL PROTECTED] _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
